# 6 Simple Techniques For Big Coins

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

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

Here is the catch. In order to get bitcoin miners to actually earn bitcoin from verifying transactions, two things have to occur. To begin with, they must verify 1 megabyte (MB) worth of transactions, which can technically be as small as 1 transaction but are more often several thousand, depending on how much data each transaction stores.

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Second, in order to put in a block of transactions to the blockchain, miners should fix a complex computational science difficulty, also called a"proof of labour " What they are actually doing is trying to think of a 64-digit hexadecimal number, called a"hash," that's less than or equivalent to the hash.

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In other words, it's a bet. .

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

The reverse is also true. If computational power has been taken from this network, the problem adjusts downward to make mining easier. .

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

"Let's say I'm thinking of the number 19. If Friend A guesses 21, they shed because 21>19. If Friend B supposes 16 and Friend C supposes 12, then they have both technically came at workable answers, since 16<19 and 12<19. There is 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'guess what number I'm thinking of' question, but I am not asking only 3 friends, and I am 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's going to be extremely difficult to guess the ideal answer." .

If you can check here 1 in seven trillion doesn't sound difficult enough as is, here's the grab to the grab. Not only do bitcoin miners need to think of the ideal hash, but they also have to be the 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 produce hashes. Only a decade ago, bitcoin miners could be carried out competitively on normal desktop computers. Over time, however, miners recognized that graphics cards commonly utilized for video games were more effective at mining than desktops and graphics processing units (GPU) came to dominate the match.

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

Today, bitcoin mining is so competitive that it can only be done profitably with the latest up-to-date ASICs. When using desktop computers, GPUs, or elderly versions of ASICs, the cost of energy consumption actually exceeds the revenue generated. Even with the newest unit at your disposal, one computer is rarely enough to compete with what 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% of bitcoin computing power. .

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Between 1 in 7 trillion odds, scaling difficulty levels, and also the massive network of consumers verifying transactions, one block of transactions is confirmed roughly every 10 minutes. But its important to keep in mind that this content 10 minutes is a goal, not a rule.