# Not known Facts About Trading Bitcoin Futures

In 2009, it was 50. In 2013, it was 25, at the time of writing it is 12.5, and sometime in the center of 2020 it will halve to 6.25. .

At this speed of halving, the entire number of bitcoin in circulation will approach a limit of 21 million, making the currency more scarce and valuable over time but also more expensive for miners to produce.

Here's the catch. In order for bitcoin miners to actually earn bitcoin from verifying transactions, two things must occur. First, they must verify 1 megabyte (MB) worth of transactions, which can theoretically be as small as 1 transaction but are more often a few thousand, depending on how much information each transaction stores.

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Second, in order to put in a block of transactions to the blockchain, miners must fix a complex computational science difficulty, also called a"proof of work." What they are doing is trying to come up with a 64-digit hexadecimal number, known as a"hash," that is less than or equivalent to the target hash.

## About Is Bitcoin Mining Profitable

In other words, it is a gamble. .

The difficulty level of the most recent block at the time of writing is about 7,184,404,942,701. That is, the chance of a computer producing a hash below the goal is 1 in 7,184,404,942,701 less than 1 in seven trillion. That amount is corrected every 2016 blocks, or roughly every two weeks, with the aim of keeping rates of mining constant.

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The reverse is also true. If computational power has been taken from the network, the difficulty adjusts downward to earn mining simpler. .

"Say I tell three friends I'm thinking of a number between 1 and 100, and I write that number on a piece of paper and seal it in an envelope. My friends don't have to guess the exact number, they just have to be the first person to guess any number that's less than or equal to this number I'm thinking of.

"Let us say I am thinking about the number 19. If Friend A guesses 21they shed because 21>19. If Friend B guesses 16 and Friend C supposes 12, then they have both technically came at workable answers, since 16<19 and 12<19. There's no'extra credit' for Friend B, even though B's answer was closer to the target answer of 19. .

"Now imagine that I present the'imagine what number I am thinking of' question, but I'm not asking just three friends, and I'm not thinking of a number between 1 and 100. Instead, I am asking millions of prospective miners and I'm thinking of a 64-digit hexadecimal number. Now you see that it is going to be extremely hard to guess the right answer." .

If 1 in 7 trillion doesn't sound difficult enough as is, here is the grab to the catch. Not only do bitcoin miners have to think of the ideal hash, they also have to be the very first to perform it.

Since bitcoin mining is essentially guesswork, arriving at the right answer before another miner has almost everything to do with how fast your computer can create hashes. Just a decade ago, bitcoin miners could be carried out competitively on normal desktop computers. Over time, however, miners realized that pictures cards commonly used for video games tend to be more effective at mining than desktops and graphics processing units (GPU) came to dominate the match.

### Excitement About Big Coins

These can run from \$500 to the tens of thousands. .

Today, bitcoin mining is so aggressive it can only be done profitably with the latest up-to-date ASICs. When using desktop computers, GPUs, or elderly versions of ASICs, the expense of energy consumption actually surpasses the revenue generated. Even with the newest unit available, one computer is seldom enough to compete with exactly what miners call"mining pools." .

A mining pool is a group of miners who combine their computing ability and divide the mined bitcoin between participants. A disproportionately high number of blocks are mined by pools rather than by individual miners. In July 2017, mining pools and companies represented roughly 80% to 90 percent of bitcoin computing power. .