BTC peak
bitcoin is not the mainstream currency now. Its skyrocketing price has nothing to do with us ordinary people for the time being, but it is far fetched to say that its bull market is coming. This may be just a short-term rebound
the peak value of bitcoin used to be US $20000. Since it fell to US $3500 in 2018, it has been in a state of occasional rebound. Although it has risen by 20%, it is still only US $5000. Compared with the high price of US $2W, it is only one fourth
at present, there is no clear statement about the attitude of government agencies in various countries towards bitcoin, especially as the world's largest bitcoin procer, the attitude of the Chinese government is more important, but until now, no official attitude has been found. The market is waiting to see, this wave of rise is likely to be the chain reaction caused by the reluctance of most holders to sell
at present, most people are bearish on bitcoin, but as an encrypted digital currency, whether it can be controlled is the government's consideration. If a currency is not effectively regulated, it will become a paradise for black instry. The damage to the economy and society will be immeasurable
therefore, at present, bitcoin is only a game for a small number of players, and the current holder is just a quilt. They hope to soar, but at present, it can only be a disappointing result
unlike all currencies, bitcoin does not rely on a specific currency institution to issue. It is generated by a large number of calculations based on a specific algorithm. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses cryptography design to ensure the security of all aspects of currency circulation. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction. The design based on cryptography can make bitcoin only be transferred or paid by the real owner. This also ensures the anonymity of money ownership and circulation transactions. The biggest difference between bitcoin and other virtual currencies is that the total amount of bitcoin is very limited and it has a strong scarcity
according to the notice on preventing the financing risk of token issuance, there is no approved digital currency trading platform in China. According to China's digital currency regulatory framework, investors have the freedom to participate in digital currency transactions at their own risk
warm tips: the above information is for reference only. Before investing, it is recommended that you first understand the risks existing in the project, and understand the investors, investment institutions, chain activity and other information of the project, rather than blindly investing or mistakenly entering the capital market. Investment is risky, so we should be cautious when entering the market
response time: December 28, 2020. Please refer to the official website of Ping An Bank for the latest business changes
[Ping An Bank I know] want to know more? Come and see "Ping An Bank I know" ~
https://b.pingan.com.cn/paim/iknow/index.html
It's about 37 yuan
let me first introce the reward mechanism of bitcoin system
bitcoin can basically dig out a block every 10 minutes through system settings. The reward for each block is given to the miners who dig out the block. The miner who digs out the block is called the block miner. The block miner will record the legal transactions in the bitcoin network to the blockchain, so that the miner can receive the service charge for bookkeeping
there are two parts in the reward for the block Miner: one part is the reward given by the system, which is called coinbase reward (also known as system issuance reward), the other part is the reward for bookkeeping, which is called miner's fee. The coinbase reward started with 50 bitcoins. For every integral multiple of 210000 blocks, the coinbase reward will be halved. This is what we often hear about bitcoin mining reward halved in four years
at the present stage, the reward of coinbase is 12.5 bitcoins. At the present stage, the average transaction miner fee received by miners for digging out a block is about 0.1 bitcoin (not fixed), that is to say, the average reward received by miners for digging out a block is about 12.6 bitcoin
about 99% of miners' rewards come from the system's coinbase rewards. According to the bitcoin system, one block can be g out every 10 minutes on average. The number of new blocks that can be g out in one day is 144 (60 * 24 / 10 = 144). At present, the number of bitcoins that can be g out every day is 1800btc (144 * 12.5btc = 1800btc). With the miner's fee of about 0.1btc per block, the total reward for all miners in one day is about 1814.4btc
the issuance of bitcoin does not depend on indivials or teams, but through a process called "mining". By solving the problem of cryptography, people get the right to create new blocks and get rewards. It can be said that the new bitcoin is proced to reward miners to verify blocks. In the beginning, 50 bitcoins were awarded for each block packed. Nakamoto designed a set of rules. For every 210000 blocks excavated (about four years), the reward will be halved. This is what we call "halving" event
the first half was at the end of 2012, when 50 bitcoins were awarded to the 210000 block, but only 25 bitcoins were awarded to the 210001 block
the second half took place in the middle of 2016, and the reward was halved again, so 12.5 bitcoins were awarded in 420001 block
and so on...
until around 2140, 21 million bitcoins were g up, and then they stopped rewarding
Why do we need this half design? If bitcoin is issued too fast and there is no circulation limit, there will be a large amount of bitcoin in circulation in the market, and it will definitely be greatly devalued. One thing to remember: bitcoin is valuable. First, the number of bitcoins is fixed, that is 21 million; Moreover, through the halving process, inflation in the bitcoin economy can be suppressed
the third halving will take place in May this year. Let's wait and see.
Yes in the early morning of December 20, the price of bitcoin broke through $24000 , and reached a record high of $24156. Bitcoin is up 24.65% this week and 233% this year
According to Kang Lu, senior analyst of fire currency, the unilateral rise of the market is not a healthy performance of the market, but a certain correction of the market is a healthy performance of the market. Kanglu believes that the market will not continue to rise, and breaking the new high does not mean that the market will continue to rise all the way, but it will have a strong impact on the psychological level of investors, and the market may form a certain buying consensus According to the securities times, on Friday, the U.S. Treasury proposed new regulations on digital currency regulation, requiring some cryptocurrency dealers to provide information about their identities in order to curb the use of this new technology by criminals for anonymous asset transfer. The proposal has 15 days for public comment. Affected by the news, bitcoin once fell by about $200 in the short term, breaking through $22880, but soon recoveredit is learned that the new regulation mainly aims at allowing the holder of the unique digital key to store the cryptocurrency and trade directly with others without going through the accounts of financial institutions. This kind of account usually exists in the form of U disk, computer or mobile phone software
such accounts are usually not associated with an indivial's name and address, and regulators believe that compared with the banking system, cryptocurrency is more attractive in the eyes of criminals and money launderers
under the new rules, banks and cryptocurrency trading platforms will have to keep records of customers' cryptocurrency transactions and counterparties in any transaction over US $3000 to verify their identities. According to the U.S. banking regulation called "travel rule", financial institutions must share specific information when transferring money to each other
in addition, banks and digital currency trading platforms must report to FinCEN every 15 days any cryptocurrency transactions involving unmanaged wallets and exceeding US $10000
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.
At present, foreign bitcoin trading platforms show that the peak value of bitcoin trading price has exceeded the US $7400 mark, and it is also a wave to US $7500. At the same time, bitcoin cash (BCH) is also rising with the tide
it seems that the rise of bitcoin price drives the whole money market, so there is the rise of bitcoin cash; But is that really the case
in fact, bitcoin cash is different from bitcoin. The biggest difference is that the block capacity of the blockchain is 8m; Similarly, it does not recognize segwit, which is a new branch of bitcoin compared with the capacity of the original 1m bitcoin block
user needs also determine the price
whether it's real goods or the digital currency virtual goods we are talking about, it's just with user needs that they are created. Although the price of bitcoin cash (BCH) has been hovering around $300 before, from the current price of bitcoin, there is still a lot of room for the rise of bitcoin cash (BCH); Is the rise of bitcoin's cash price not in the form of user demand
BCH has great development prospects
BCH is the digital currency most in line with the original heart of bitcoin
the original intention of Nakamoto's design of bitcoin is to be a kind of currency widely used by human beings, a point-to-point currency which is different from the current legal currency system and cannot be eliminated by power. In order to achieve this goal, bitcoin network must keep the transaction fees at a very low level, so that all users feel indifferent; The second is to give users a stable confirmation expectation, that is, 10 minutes to confirm. But now bitcoin is off track. Bitcoin cash (BCH) is based on this point-to-point e-cash system to improve
increase in computing power
the rise in the price of bitcoin cash is also inseparable from the mining computing power of bitcoin cash. With the increase of the mining difficulty of bitcoin and the decrease of the mining difficulty of BCH, the miners think that it will be easier to dig BCH, and it is more profitable to dig bitcoin cash (BCH) than bitcoin, so the computing power will switch to BCH. With the rising price of BCH, digging BCH will become more profitable
bitcoin will be bifurcated again, which is good for BCH
bitcoin will be bifurcated again in November, which is good for bitcoin cash. Because the consensus of the bitcoin community is not consistent, bitcoin is likely to become two kinds of coins after the bifurcation in November. The newly generated bitcoin with the capacity expanded to 2M and the non expanded bitcoin will compete for the naming right of "bitcoin". The fight for naming right will bring great economic chaos and replay attack, which is a threat to users' assets. Some users will move to the bitcoin cash (BCH) camp in order to preserve their assets. If segwit2x hard fork fails in November, bitcoin cash (BCH) will be used as a solution for bitcoin expansion, and will gain more users' support e to its own advantages. Therefore, before the bifurcations of bitcoin come, some investors will invest in BCH to avoid risks, which will also cause a wave of rise
the continuous improvement of bitcoin cash (BCH)
there have been many supporters since BCH came into being. With the continuous development of BCH, many trading platforms, infrastructure, businesses have joined the BCH camp. Because BCH has the advantages of low transaction fees and reliable transaction confirmation that bitcoin does not have at present, it is inevitable for BCH to recover the territory lost by BTC e to transaction congestion and soaring costs in the future. At present, BCH community has been comparable with BTC community
BCH's surge is inevitable. Because the emergence of goods is to meet people's needs BCH, as a point-to-point e-cash system which is most in line with Nakamoto's idea, is very promising. With the development of time, it is possible for BCH to surpass BTC in price as well as in value