# The Definitive Guide to Big Coins

In 2009, it was 50. In 2013, it was 25, at the time of writing it's 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 make.

Here is the catch. In order to get bitcoin miners to really earn bitcoin from verifying transactions, two things must happen. To begin with, they need to verify 1 megabyte (MB) value of transactions, which can theoretically be as small as 1 transaction but are far more often a few thousand, depending on how much data each transaction shops.

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Second, in order to add a block of transactions to the blockchain, miners should solve a intricate computational science difficulty, also referred to as a"proof of work" What they are actually doing is trying to think of a 64-digit hexadecimal number, known as a"hash," that is less than or equivalent to the target hash.

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In other words, it is a gamble. .

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 below the target is just 1 in 7,184,404,942,701 less than 1 in seven trillion. That amount is adjusted every 2016 blocks, or about every 2 weeks, with the aim of keeping rates of mining constant.

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The opposite is also correct. If computational power is taken off of this network, the problem adjusts downward to make mining simpler. .

"Say I tell three friends that 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 am thinking of.

"Let us say I am thinking about the number 19. If Friend A guesses 21, they lose because 21>19. If Friend B guesses 16 and Friend C supposes 12, then they've both theoretically arrived at viable answers, because 16<19 and 12<19. There's no'extra credit' for Friend B, even though B's answer was nearer to the target answer of 19. .

"Now imagine that I pose the'guess what number I'm thinking of' question, but I am not asking just 3 friends, and I am not thinking of a number between 1 and 100. Instead, I am asking millions of would-be miners and I'm thinking about a 64-digit hexadecimal number. Now you see that it is going to be extremely difficult to guess the ideal answer." .

If 1 in 7 trillion doesn't sound difficult enough as is, here's the grab to the catch. Not only do bitcoin miners need to think of the right hash, 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 everything to do with how fast your computer can produce hashes. Just a decade ago, bitcoin miners could be performed competitively on normal desktops. Over time, however, miners recognized that pictures cards commonly used for video games tend to be more effective at you could try these out mining than desktops and graphics processing units (GPU) came to dominate the game.

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

Nowadays, bitcoin mining is so competitive it can only be done profitably using the most up-to-date ASICs. When using desktop computers, GPUs, or older versions of ASICs, the expense of energy consumption actually exceeds the revenue generated. Even with the newest unit at your disposal, one pc is seldom enough to compete with exactly what miners call"mining pools" .

An 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. .

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

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The bitcoin network can process about seven transactions per second, with transactions being logged in the blockchain every 10 minutes. Since the network of bitcoin users continues to grow, however, the number of transactions made in 10 minutes will eventually exceed the number of transactions that can be processed in 10 minutes.