# What Does How To Trade Bitcoin Mean?

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 costly for miners to make.

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

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

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In other words, it's a gamble. .

The difficulty level of the most recent block at the time of writing is about 7,184,404,942,701. In other words, 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 level is adjusted every 2016 blocks, or about every 2 weeks, with the goal of keeping rates of mining constant.

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

"Say I tell three friends 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 have to be the very first person to figure any number that is less than or equal to the number I am thinking of.

"Let us say I am thinking of the number 19. If Friend A guesses 21they lose because 21>19. If Friend B guesses 16 and Friend C guesses 12, then they've both technically came at viable answers, because 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 I present the'imagine what number I'm thinking of' question, but I'm not asking only three friends, and I'm not click reference thinking of a number between 1 and 100. Rather, I am asking millions of prospective miners and I am thinking of a 64-digit hexadecimal number. Now you see that it is going to be quite difficult to guess the right answer." .

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

Since bitcoin mining is essentially guesswork, arriving at the ideal answer before another miner has almost everything to do with how fast your computer can produce hashes. Just a decade ago, bitcoin miners can be carried out competitively on normal desktop computers. As time passes, however, miners recognized that graphics cards commonly used 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 using the most up-to-date ASICs. When using desktop computers, GPUs, or older models of ASICs, the expense of energy consumption actually surpasses the revenue generated. Even with the newest unit available, one pc is rarely 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. .

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Between 1 in 7 trillion chances, scaling difficulty levels, and the huge network of users verifying transactions, one block of transactions is verified roughly every 10 minutes. But its important to keep in mind that 10 minutes is a goal, not a rule.

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The Get the facts bitcoin network can process about seven transactions per second, with transactions being logged in the blockchain every 10 minutes. As the network of bitcoin consumers continues to grow, but the number of transactions made in 10 minutes will eventually exceed the number of transactions which can be processed in 10 minutes.