Btcusd historical data

1. In January 2017, the lowest price of bitcoin was $796
in December 2017, the highest price of bitcoin was US $19798
in 2018, the lowest price of bitcoin is $3155
in 2018, the highest price of bitcoin was US $17157
in 2019, the lowest price of bitcoin is US $3353
in 2019, the highest price of bitcoin will be $13968
by 2020, the lowest price of bitcoin is US $3800
so far in 2020, the highest price of bitcoin is US $35000
from the above data, it can be clearly seen that bitcoin has fluctuated a lot over the years
historically, it has been rising. In the long run, I think bitcoin is worth investing

2. Bitcoin used to be synonymous with overnight wealth. In 2017, bitcoin had a record high price, with the highest value of about $20000
according to the data of coindesk digital currency trading platform, the price of bitcoin once fell below US $6000 in 18 years, which has dropped by 70% compared with the highest value of US $20000 in 2017

"the price movements we are seeing now may seem drastic, but they are quite normal for this market." Etiro's senior market analyst, MATI Greenspan, wrote in an email to CNBC

with the decline of bitcoin, most digital currencies are affected, and other digital currencies are not much better. Most digital currencies are down by more than 10%. But in the long run, the future of digital currency is worth looking forward to.

3.

Bitcoin price accelerated to rise at the same time, there has been a more rapid decline in the callback

according to the price of coindesk on bitcoin news and information network, on January 11, the price of bitcoin fell to about US $30305, down 27.78% from the highest price of US $41962 in history. In other words, the price of bitcoin fell from $40000 to $30305 in just over a day. Before that, bitcoin took six days to rise from $30000 to $40000

from the macro-economic environment, Yu Jianing believes that the correction on January 11 can be regarded as a hedging measure taken by overseas mainstream investment institutions. He believes that one of the reasons for bitcoin's rise this year is the continued decline of the dollar index. At present, Biden's government is coming to power, "bad is good", the dollar may rebound, global commodity assets have a significant correction, and the digital asset market will adjust accordingly

in recent days, the US dollar index has risen significantly. As of press release, the US dollar index is about 90.49, down 0.06 from the previous day and up 1.16% from the closing price of 89.42 on January 6

he also pointed out that many bitcoin miners choose to sell at relatively high prices. According to cq.live, the miner's position index (MPI) has reached its highest level this year. The MPI index is higher than 2, which indicates that miners tend to sell bitcoin after mining; If MPI is negative, it indicates that they are optimistic about the short-term trend and choose to hoard bitcoin. At present, the value is about 5.26, indicating that the miners are selling bitcoin on the over-the-counter market or exchange. In addition, bytetree data also shows that in the past week, bitcoin miners g out 6894 bitcoins, but sold 10047 bitcoins, which means that the miners sold nearly 3153 bitcoins in stock

Yu Jianing mentioned that another reason for the decline is the website downtime of the largest compliance exchange in the United States, such as coinbase, after the market fluctuated violently, which delayed the trading of users, and many buying orders could not be traded normally, which also led to the bitcoin price on the website far lower than the market price, further aggravating the market panic

"e to the failure of the coinbase system, we could only sell but not hang up the bill yesterday, and the whole trading world order was destroyed." A coin circle employee also said

regulatory warning bitcoin volatility risk

it is worth noting that the recent ups and downs of bitcoin has also aroused the vigilance of regulatory authorities in various countries

On January 12, the New Zealand financial market authority (FMA) warned new Zealanders to invest in cryptocurrency prudently, according to the New Zealand Herald

"new Zealanders who are considering buying cryptocurrencies such as bitcoin should realize that they are high-risk and highly volatile assets," a spokesman for the New Zealand Financial Markets Authority said. "Cryptocurrencies are not regulated in New Zealand and are often used by fraudsters and hackers."

According to the times on January 9, HSBC has decided to stop providing cryptocurrency trading services to customers in the UK, including prohibiting customers from depositing funds into HSBC from their digital wallets. At the same time, many other UK banks have banned customers from using credit cards to buy digital currencies such as bitcoin

"the virtual currency represented by stable currency is facing more and more complicated compliance risks. As more and more economic activities migrate to the blockchain, the instry is facing great compliance pressure. The circulation of stable currencies such as usdt will grow explosively in 2020, reaching a record high. Behind this, part of the use demand comes from the normal transactions in compliance, but there are also black and gray demands for money laundering, illegal financing and other problems. In the future, the blockchain instry will face more and more compliance challenges. " Yu said

he pointed out that according to the report on anti money laundering of virtual currency released by peckshield in 2020, the value of unregulated outbound virtual currency reached US $17.5 billion in 2020, an increase of 51% compared with that in 2019, and it is still growing rapidly. The number of fraud cases involving virtual currency continued to rise to 151, an increase of 655% over 2019

Yu Jianing said: "since the second half of 2020, fraud, attack, extortion, gambling and other assets, as well as money laundering, run points and other gray assets, have begun to turn into virtual currency money laundering. The number of extortion cases has increased rapidly, and the situation of virtual currency anti money laundering is grim. In 2021, it is necessary for the blockchain and digital assets instry to adopt a more strict and prudent KYC (know your customer) review mechanism, More stringent anti money laundering standards will be implemented. "

4. On November 1, 2008, a self styled Satoshi Nakamoto posted a research report on a secret cryptography discussion group, which expounded his new idea of e-money bitcoin came out
on January 3, 2009, Nakamoto g up the first batch of 50 bitcoins on a small server in Helsinki, Finland< On May 21, 2010, the first bitcoin transaction: Florida programmer Laszlo
hanyecz bought a $25 pizza coupon with 10000 BTC< On July 16, 2010,
the price of BTC rose by US $0.08 from US $0.008, showing the rise of new things
on July 17, 2010, the first bitcoin platform was established
on November 6, 2010, the price on mtgox reached $0.5, and the bitcoin economy reached $1 million
on December 7, 2010, the first portable device to portable device transaction was realized on Nokia 900, with a transaction volume of 0.42btc
on February 9, 2011, the price reached US $1 for the first time, which is equivalent to US $1. The news that BTC is equivalent to us dollar has been widely reported by the media, which has aroused people's great attention, and the number of new users has increased greatly. In the next two months, bitcoin and pound sterling, Brazilian currency, Polish currency exchange trading platform has opened
on March 18, 2011, the BTC / USD exchange rate hit a seven week low, falling to US $0.7
on August 20, 2011, the first bitcoin conference and World Expo were held in New York. Among Google trend counties, bitcoin's attention reached a new high, with a price of $11 at that time
on November 14, 2011, the price of bitcoin hit a new half year low of $1.99
on September 15, 2012, the bitcoin conference was held in London. At this time, the price of bitcoin was $11.8
on September 27, 2012, bitcoin fund was founded, and the price of bitcoin was $12.46
on November 25, 2012, the first bitcoin conference in Europe was held in Prague, Czech Republic. At this time, the price of bitcoin was $12.6
on February 19, 2013, bitcoin client v8.0 was released. At this time, the price of bitcoin was $28.66
on April 10, 2013, BTC set a record high price of $110
on May 9, 2013, BTC Chinese, the largest bitcoin reporting website www.sosobtc.com The company obtained the investment fund union
square's $5 million round a investment, and the price of bitcoin was $112.09< On May 17, 2013, the San Jose bitcoin conference was held with 1300 participants. At this time, the bitcoin price was US $119.1.
on May 28, 2013, the US Department of Homeland Security banned the virtual currency service of Liberty Reserve, a Costa Rican exchange company, for suspected xiqian and unlicensed fund transfer business, U.S. prosecutors said that this will become the largest international xiqian lawsuit in history, with the scale of absorbing money reaching 6 billion US dollars. A large number of users, including China, will lose all their money. At this time, the price of bitcoin is 128 US dollars
in June 2013, Netcom said that the United States will withdraw from qe3, deflationary bitcoin and quantitative easing monetary policy, which are the relationship between the two
on June 27, 2013, the German Conference made a decision: holding bitcoin for more than one year will be tax-free, which is considered by the instry to recognize the legal status of bitcoin. At this time, the price of bitcoin is $102.24
on June 28, 2013, mtgox obtained the monetary service license issued by the financial crime enforcement network office of the U.S. Department of the Treasury. Transaction standardization may mean that bitcoin is on the right track, government risk is reced, and its pace of integration into the display economy will be accelerated. At the same time, it will play an exemplary role in other virtual currencies. At this time, the price of bitcoin is $97.99< On November 28, 2013, the bitcoin trading price of Mt.
GOx, a popular bitcoin exchange, broke through $1000, reaching a record high of $1073
on November 29, 2013, the trading price of bitcoin on Mt. GOx, a popular exchange, hit a record high of US $1242, while the price of gold was US $1241.98 an ounce, surpassing that of gold for the first time.

5. Manual shooting skills of SLR camera
1. Take close-up pictures of small still objects, such as flowers, birds and insects:
use AV file, the aperture should be f5.6 or below, the focal length should be more than 50, and try to shoot within 1m to make the background virtual
if the light is good, ISO 100, if the light is bad, ISO should be within 400<

2. Shooting people:
basically use a large aperture (within f5.6) and a focal length of more than 50 mm. The shooting distance depends on the whole body, half body and big head, which makes the background virtual. Use AV file
good light, iso100, bad light, iso400
people in motion use tracking to reflect the sense of motion (see the shooting of moving objects below for details)<

3. Shooting:
AV file, use the appropriate aperture, above F8, the focal length is arbitrary, but generally the wide-angle end has distortion, use it as appropriate<

4. Shooting night scene:
upper tripod, AV gear, custom white balance or incandescent lamp, aperture above F8, small aperture can make the light proce starlight effect, use the reflector pre rising function to rece the vibration caused by the reflector lifting after pressing the shutter; And cover the viewfinder with the square cover on the strap to prevent stray light from entering from the back and affecting the image quality; ISO 200, as far as possible to make the exposure time longer, so that some people who have no intention to walk away from the screen disappear, leaving no traces, clean the scene
for example, when taking a square with people coming and going, you can use a very small aperture of about F20 and iso100. In this way, the exposure time will be very long, and the moving figures will not stay in the photos! The square will be clean<

5. Shooting fireworks:
using shutter line and B shutter, you can shoot multiple fireworks overlapping effect<

6. Shooting things:
when the light is good: AV, the aperture size should be handled according to the circumstances; Large depth of field can be obtained by using aperture above F8, and shallow depth of field can be obtained by using small aperture
if you want to have a very dynamic effect, you can use the TV gear, the shutter is about 1 / 30, when you focus and press the shutter, the lens will follow the object at an appropriate speed, which will proce a very dynamic effect
poor lighting: we can only handle it according to our own discretion, plus use the follow-up camera<

7. Shooting running water or fountain:
using TV and about 1 / 50 shutter speed, you can shoot Satin effect. If you use too fast shutter speed, the fountain will shoot discontinuous water drops<

8. Taking photos at night:
use tripod to adjust white balance, and automatically or custom white balance; iso100-400 AV gear, aperture about F8, use slow synchronous flash, rear curtain flash mode; At this time, the flash will flash twice, press the shutter to flash once, and flash again before the end of exposure, so don't leave before flashing twice
in this way, the characters can be clear and the background neon is beautiful, so that the background will not be too dark e to insufficient exposure< No matter what you shoot, don't shoot with the maximum aperture unless you want to keep a safe shutter
2. Please use the aperture of F8 ~ F11 as much as possible when shooting scenery
3. The maximum aperture can be reced by 1-2 levels when taking close-up of people and still life
4. The safety shutter should be controlled above the reciprocal of the focal length as far as possible. The wide-angle shutter should also be more secure at more than 1 / 30 second. If the shutter is insufficient, please increase the aperture or ISO<

metering method:
1. Don't measure the light to the sky or the darkest place. Go to the middle value
2. According to your subject matter, make good use of the metering mode (balance metering, point metering, central key metering...)
3. If the light measurement is not accurate, please use AE lock to expose and lock the gray things around you before shooting
4. Try not to measure the light on white or black objects, otherwise remember to rece eV for black and increase eV for white<

EV is exposure compensation.
exposure compensation is also an exposure control method, which is commonly used in ± If the ambient light source is dim, the exposure value (such as + 1eV, + 2eV) can be increased to highlight the clarity of the picture
most of the small digital cameras adjust the exposure compensation through the menu
in the process of shooting, if you press half of the shutter, the LCD will display pictures similar to the final effect picture, focusing and exposure will start. The exposure at this time is exactly the exposure of the final picture. If the picture is obviously bright or dark, it means that the automatic metering accuracy of the camera has a large deviation, and the exposure compensation should be enforced, but sometimes the brightness displayed ring shooting is different from the actual shooting result. Digital camera can browse the picture immediately after shooting, at this time, you can more accurately see the brightness of the picture, there will be no difference. If the shooting result is obviously bright or dark, it is necessary to re shoot and force the exposure compensation
the shooting environment is dim, and the brightness needs to be increased. When the flash cannot work, the exposure can be compensated and the exposure can be increased appropriately. For exposure compensation, if the photo is too dark, increase the EV value. Every 1.0 increase in EV value is equivalent to doubling the amount of light intake. If the photo is too bright, decrease the EV value. Every 1.0 decrease in EV value is equivalent to doubling the amount of light intake. The compensation interval can be adjusted in 1 / 2 (0.5) or 1 / 3 (0.3) units according to different cameras
when the white object to be photographed looks gray or not white enough in the photo, it is necessary to increase the exposure. In short, "the whiter the object is, the more white the object is." this seems to run counter to the basic principles and habits of exposure. In fact, it is not. This is because the main body of the camera is often the center of the light measurement, and the White main body will make the camera mistakenly think that the environment is very bright, As a result, the exposure is insufficient, which is also a common problem for most beginners
because the shutter time or aperture size of the camera is limited, it is not always able to reach the 2eV adjustment range, so the exposure compensation is not omnipotent, and it may still be underexposed in too dark environment. At this time, it is necessary to consider cooperating with the flash or increasing the ISO sensitivity of the camera to improve the brightness of the picture
generally speaking, the smaller the brightness contrast of the scene, the more accurate the exposure, otherwise, the larger the deviation. The grade of the camera is high and low. If the grade is high, the metering is more accurate, and if the grade is low, the deviation will be increased. If it is a traditional camera, the tolerance of film is relatively large, and the exposure deviation will not have a big problem within a certain range, but the CCD tolerance of digital camera is relatively small, and slight exposure deviation may affect the overall effect
in a word, the adjustment of exposure compensation is determined by experience and sensitivity to color. Users must compare the image quality, clarity, restoration degree and noise size under different exposure compensation to get the best picture

note:
the aperture in Canon's manual refers to the F value. The larger the aperture, the greater the depth of field
generally speaking, aperture refers to aperture, which is inversely proportional to F. the larger the aperture, the smaller the depth of field
AV -- aperture priority auto exposure
TV -- shutter priority auto exposure
AE auto exposure
AF auto focus
AF-S -- single auto focus, the same as saf. The opposite is continuous autofocus
MAF - monitor AF, which can shorten the focusing time. The camera will adjust the focus before half pressing the shutter button, so that you can compose with the adjusted focus. When the shutter button is half pressed and AF locking is completed, the focus will be locked
ev - exposure value, which is usually used in exposure compensation
ISO sensitivity. Each difference of sensitivity is equivalent to the corresponding exposure value of aperture or shutter
brother, if you have time, go to ZhongGuanCun video forum and see the forum.

6. Hash algorithm maps any length of binary value to a fixed length of smaller binary value, which is called hash value. Hash value is a unique and compact numerical representation of a piece of data. If you hash a piece of plaintext and change only one letter of the paragraph, subsequent hashes will proce different values.

7. It's a very simple truth. Now bitcoin has a contract transaction. To put it bluntly, it's the kind that can be short. Some people choose to short bitcoin. When bitcoin rises sharply, it will burst

8. Condyloma acuminatum does not grow there, it is not mucous membrane
unless it's broken
1. Wash regularly
2. Strangle with thin thread.

9.

As of 14:24 Beijing time on the 27th, data from coindesk showed that bitcoin was quoted at US $27372 per coin, up more than 10% in 24 hours. The total market value of bitcoin is 508.6 billion US dollars (about 3.3 trillion yuan) , and it can buy about 22 Yunnan Baiyao (the latest total market value of a shares is 146.3 billion)

it is understood that since the birth of bitcoin in 2009, its first price was about US $0.0025 when it was purchased in 2010. Based on the price of US $27000, the price increase of bitcoin since its birth has reached 10.8 million times

that is to say, the original investment of RMB 1 can buy 61.3 bitcoins, and the current position value is RMB 10.8 million. Even if bitcoin has made such an amazing increase, Citibank recently announced a target price of $300000, which is 11 times higher than the current price

expansion data:

24 hours, the whole network burst warehouse 4 billion 600 million

controversy surrounding bitcoin has never stopped, some people think it is hype, sooner or later, it will be "tulips bubble", some people think that the bitcoin's scarcity has pushed up its rise. So some are short and some are long

on a day of crazy rise, short bets of bitcoin were completely exploded. According to the real-time statistics of bitcoin home.com, in the last 48 hours, the fund of all kinds of cryptocurrencies in the whole network has burst to US $700 million (RMB 4.6 billion), of which the fund of bitcoin has burst to US $587 million, and the number of people in the whole network has exceeded 60000 in the last 48 hours

According to the historical data, the short position burst on the 27th was up 136% compared with the previous trading day