How many times is bitcoin now

1. On May 22, 2010, Laszlo hanyecz, a programmer in Jacksonville, Florida, bought $25 worth of pizza with 10000 BTC. Up to now, it's about $2720 a bitcoin. If you want to know more about bitcoin or blockchain, you can follow Youku's "Yangyang interview"

2.

About 400 percent

when bitcoin first appeared in 2009, one dollar could buy almost 1300 bitcoins. Before April 2011, the price of each bitcoin was always below $1. In June 2011, the highest price of bitcoin rose to $30. Then, the price almost fell within a week. In 2012, the price of bitcoin once fell below $2

further dropped to $114 on January 14, 2015. Since then, bitcoin has begun to rise again. In 2017, after the bitcoin ETF fund was rejected by the US Securities Regulatory Commission, bitcoin plummeted by $315 to below $1000. After that, it rose again. In the first four months of this year, the price of bitcoin and an ounce of gold were almost equal

However, with the strong rise of bitcoin in this round, the price of bitcoin has exceeded the price of an ounce of gold. On April 26, the price of bitcoin was $1282.97, compared with $1264 for an ounce of gold. Bitcoin has surpassed gold in price

extended data

in 2016, there were dozens of bitcoin exchanges in the world, and the trading volume of bitcoin in most countries and regions increased sharply. Among the countries and regions with the highest growth rate, the trading volume of bitcoin in Japan is second only to China, ranking second in the world; The local bitcoin trading volume in Venezuela increased by more than 913%

South Korea has become the sixth largest bitcoin trading market in the world, Korean people can buy bitcoin from a large number of convenience stores, and korbit's trading volume currently accounts for 70% of the South Korean market; Local bitcoin transactions in Colombia increased by about 370%; Bitcoin markets in Malaysia, Russia and Australia are also developing rapidly. Bitcoin trading in China once accounted for more than 80% of the global trading volume

3. It's not said that CPU can't dig. In the beginning, CPU was used to dig. However, with the in-depth study of mining algorithms, we found that the original mining was repeating the same work. As a general-purpose computing unit, CPU designed many moles such as branch prediction unit, register unit and so on, which did not help to improve the computing power at all
in addition, CPU is not good at parallel computing at all. It can perform more than ten tasks at most at one time. This is far from the fact that the graphics card has thousands of stream processors. The graphics card is too high, so we slowly develop the corresponding mining algorithm for the graphics card
taking BTC as an example, its basic algorithm principle is to take all transactions within 10 minutes as an input and add a random number. When all transactions within 10 minutes are added with your random number, a hash of sha256 is calculated. It's almost full of integer operations. It's just like a special design for a graphics card. The graphics card is very suitable for this kind of brainless algorithm. The more the number of stream processors, the better
as far as hash computing is concerned, it is almost all independent and concurrent integer computing, and GPU is designed and proced for this. Compared with the pitiful 2-8 threads of CPU and the astonishing length of control judgment and scheling branches, GPU can easily perform integer calculation concurrency of hundreds of threads (brainless brute force cracking without any judgment is the strength of a card)
OpenCL can make use of a large number of unified shaders on GPU chip, which can be used as resources for integer calculation. The resource of stream processor of a card is several times that of N card (the same level card)
but later, we found that the graphics card is still too weak, and the computing power can be greatly improved by directly using the ALU unit of large-scale ASIC stack. The computing power of the palm sized computing board is dozens of times that of the graphics card, so now bitcoin can't dig without a special ASIC miner
although a large number of interdependent and random memory access instructions are introced into the script algorithm used in the later LTC, when the footprint is large enough, a large number of cache failures will occur at the L2 level or even TLB level of GPU, resulting in more DRAM accesses, so as to weaken the advantage of ASIC / FPGA in integer operation performance compared with GPU, However, it is still targeted to develop mining machines. At present, only specialized mining machines can dig
however, the second generation of virtual currency (such as Eth and Zec) has absorbed the experience of the predecessors' blasted algorithms, and made more special optimization on the mining algorithm to prevent the occurrence of brainless operations. It has high requirements for video memory, so it can effectively resist the invasion of mining machines
because eth can only rely on graphics cards for mining, the rising price and shortage of graphics cards started in the second half of 2017. Many mine owners sold thousands of graphics cards to set up mining machines to mine these virtual currencies
over time, we all think that CPU can't mine, but in fact, the efficiency and benefit are too low.

4. The delivery contract should be 40 times, and the sustainability is 100 times.

5.

For this bitcoin, we all have a certain influence on it< because bitcoin has a group of people investing in 2021, it is in a very good state as a whole, which makes many people feel that bitcoin is a very good choice so they will choose to dig bitcoin at this time. We can also understand the occurrence of this event, because for many young markets, they still make us feel very good when facing this kind of thing, so what I don't understand is that nearly 20% of Internet cafes in South Korea choose to mine at this time, We all understand this, because bitcoin itself belongs to virtual currency{ RRRRR}

so this tells us that many people do not keep a good attitude in the process of choosing bitcoin, which will naturally have a very bad impact on us at this time