# The Definitive Guide for Is Bitcoin Mining Profitable

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

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

Second, in order to put in a block of transactions to the blockchain, miners must solve a complex computational math problem, also called a"proof of labour ." What they're actually doing is trying to think of a 64-digit hexadecimal number, called a"hash," that is less than or equal to the 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 all about 7,184,404,942,701. In other words, 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 level is corrected every 2016 blocks, or roughly every two weeks, with the aim of keeping rates of mining constant.

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The opposite is also true. If computational power is taken from this network, the difficulty adjusts downward to make mining simpler. .

"Say I tell three friends I'm thinking about a number between 1 and 100, and that I write that number on a piece of paper and seal it in an envelope. My friends don't need to guess the specific number, they simply have to be the very first person to figure any number that is less than or equal to this number I am 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 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 goal answer of 19. .

"Now imagine I present the'imagine what number I am thinking of' question, however 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 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 is the grab to the catch. Not only do bitcoin miners need to come up with the right hash, but they also must be the first to do it.

Because bitcoin mining is essentially guesswork, arriving at the ideal answer this article before another miner has almost everything to do with how fast your computer can create hashes. Just a Visit Website decade ago, bitcoin miners can be performed competitively on normal desktops. As time passes, however, miners realized that graphics cards commonly used for video games were more capable of mining than desktops and graphics processing units (GPU) came to dominate the game.

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

Nowadays, bitcoin mining is so aggressive it can only be done profitably with the most up-to-date ASICs. When using desktop computers, GPUs, or older 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" .

An mining pool is a group of miners who combine their computing power and divide the mined bitcoin between participants. A disproportionately high number of cubes 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. .