Bitcoin plummeted by thousands of dollars
Recently, the award-winning sentiment of the winners of a company's annual meeting spread in the circle of wechat friends: "first of all, I sincerely thank the company for rewarding me with 10 bitcoins worth 630000 yuan, and I feel lucky that I can win the prize worth 590000 yuan. Next, I'm going to make a good plan on how to use the 570000 yuan, after all, 550000 yuan is not a small amount...". Although it's just a joke, the price of bitcoin has been falling as it said
some analysts also believe that the trading price of bitcoin once fell below US $6000 before the chairman of the Commodity Futures Commission (CFTC) and the securities and Futures Commission (SEC), the two major US regulators, testified in the Senate on February 6 because of concerns about the US government's strict supervision. According to the testimony of CFTC and SEC presidents, they believe that Congress should consider expanding the scope of supervision of cryptocurrencies such as bitcoin, because most of these assets are not subject to investor protection laws
According to the latest data of bitfinex, poloniex, gdax and other trading platforms, the price of bitcoin continued to decline for six consecutive days. The latest price has reached the $14000 mark of Tiepo, which has dropped more than 30% from the highest point
Once people realize that's how it works, they start selling it, he says. The old bitcoin network may not work
Oldenburg admits that buying, selling or trading bitcoin is not a problem nowadays, but when bitcoin transactions are recorded in the blockchain, that is, when each transaction is recorded in the digital ledger, the problem will come to the surface. The crux of the problem is that you can only process a limited number of transactions per second in a bitcoin network, which in turn depends on the "block size" of memory in which the transactions are stored. Aldenberg said that would lead to the scarcity of liquidity and the unavailability of cryptocurrency
All in all, aldenberg doesn't believe that bitcoin will become the currency people use everyday. As long as the network is run by this group [in the old bitcoin network], these solutions will be found in bitcoin cash, where I will see the future, he saidRoger Waugh, an early investor of bitcoin and known as "bitcoin Jesus", believes that compared with the traditional version of bitcoin, bitcoin cash is faster, cheaper and more reliable. Some people in the market have predicted that bitcoin cash will replace bitcoin as the big boss of cryptocurrency, because bitcoin cash is more suitable for the efficient market
However, on Tuesday, coinbase, the leading bitcoin trading platform in the United States, announced that customers could buy and sell bitcoin cash freely, which prompted the rapid rise of bitcoin cash in the past two days, more than doubled in two trading days and set a record high of US $4300 P>said in a weekly "House View" report: "what we think is all the characteristics of bubbles: high trading volume and little practical use, which indicates that many traders are seeking speculative returns. Although the supply of bitcoin is limited, there are many more widely used cryptocurrencies, and there are now thousands of potential substitutes. "
the report from UBS's chief investment office of wealth management reiterated the bank's attitude in October. UBS said at the time that it believed that the whole encrypted money market was in the "speculative bubble". p>
in this week's report, UBS wrote: "we do not recommend customers to invest in bitcoin or short bitcoin. In principle, the irrational time of these markets is much longer than you can tolerate."
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since December last year, the price of bitcoin has continued to decline, with the average price of bitcoin hovering at US $6000. For old chives, the bear market of "bitcoin circle" for half a year seems nothing, but for those who have not yet entered, their hearts are full of doubts. Is this a new round of bear market of "coin circle", Or does it mean bitcoin has taken off all its packaging and returned to its e value. Perhaps the collapse of the currency circle is not a "bear market". Bitcoin has fallen from US $20000 to US $6000, Ethereum has fallen from the highest US $1500 to more than US $300, the prices of various air currencies and counterfeit currencies have been cleared, and the total market value of global digital currencies has fallen from more than US $800 billion to the lowest US $260 billion. More people call this a long bear market of the "currency circle", When all bad currencies leave the market, the currency circle will return to the bull market
red is like fire, pink is like haze, and white is like snow. The flowers are sweet; When I close my eyes, the trees seem to be full of peaches, apricots and pears. Under the flowers, hundreds of bees are buzzing and butterflies are flying around. Wild flowers everywhere are: miscellaneous children, with a name, no name, scattered in the grass, like eyes, like stars, but also blinking
"blowing face is not cold, willow wind", it's good, like mother's hand touching you. The wind brings the smell of some newly turned soil, mixed with the smell of grass, and the fragrance of various flowers, all brewing in the slightly moist air. The birds set their nests among the flowers and leaves. They are happy. They show off their crisp throats and sing melodies in harmony with the breeze and the flowing water. The piccolo of the shepherd boy on the cow's back is also ringing all day
rain is the most common, which lasts for three or two days. Don't be upset. Look, it's like cow hair, flower needle and fine silk. It's densely woven obliquely. There's a thin layer of smoke on the roof. The leaves are bright green, and the grass is green to your eyes. In the evening, when the lamp was on, a little yellow halo light set off a quiet and peaceful night. In the countryside, on the path, beside the stone bridge, there are people who are holding up umbrellas and walking slowly. There are also working farmers in the field, wearing coir and hat. Their houses, sparsely silent in the rain
there are more kites in the sky and more children on the ground. Every family in the city and countryside, old and small, came out one by one. Shuhuo Shuhuo muscles and bones, shake up the spirit, each do their own thing“ The plan of a year lies in the spring. "At the beginning, there are some efforts and some hopes
spring is like a newly fallen baby, which is new from head to toe and growing
in spring
It's hard to say that the value of bitcoin depends entirely on other digital currencies. Many digital currencies anchor the rise and fall of bitcoin. Moreover, although bitcoin itself limits the number of issues, its lower limit is wireless issuance. Compared with the most popular 21 million, it has been issued nearly 100000 times. Moreover, it lacks supervision, Its price is completely controlled by some capital parties and teams, becoming a tool for capital to harvest leeks
according to my estimation, the value of bitcoin will continue to rise, and it will continue to be issued, which is equivalent to a big plate. In order to attract more people into the pit, bitcoin must rely on the rise to attract investors, and then harvest through the control panel. This can also be seen from the rise and fall of bitcoin in the past five years, And the change of funds< br />
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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.
the price of bitcoin once plummeted to US $48000. There are many reasons for the rise and fall of bitcoin, one of which is the recent capital investment and speculation with the rapid development of Internet economy and network technology, bitcoin, a new open source currency, is born, which is different from traditional virtual currency. Bitcoin has initially formed a relatively complete instrial chain and market, and has become a popular financial investment proct. At the same time, it provides new ideas for the reform of e-commerce payment methods. But the price of bitcoin fluctuates a lot< since its birth, its price has experienced several sharp rises and falls. The main reasons for bitcoin's ups and downs are as follows Secondly, it is not widely used. As more and more people regard it as an investment proct, it may lose the function of currency circulation. bitcoin can be easily used in transnational money laundering activities, which has aroused the attention of financial regulators. In theory, if you want to transfer funds from China to the United States, you only need to convert RMB into bitcoin in the exchanges supporting Chinese accounts, and then sell bitcoin in the exchanges supporting U.S. bank accounts and withdraw it< transnational capital transfer is usually subject to strict supervision, and the cost of illegal underground transfer is very high. Bitcoin, as an intermediary, can transfer funds quickly at low cost strong>
