# The Facts About Is Bitcoin Mining Profitable Uncovered

In 2009, it had been 50. In 2013, it was 25, in the time of writing it is 12.5, and sometime in the middle 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 precious over time but also more expensive for miners to make.

Here's the catch. In order for bitcoin miners to actually earn bitcoin from verifying transactions, two things have to occur. First, they need to verify 1 megabyte (MB) worth of transactions, which can technically be as small as 1 transaction but are more often a few 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 intricate computational math problem, also referred to as a"proof of work" What they are doing is trying to think of a 64-digit hexadecimal number, called a"hash," that is less than or equivalent to the target hash.

In other words, it is a bet. .

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

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The reverse is also true. If computational power is taken off of this network, the difficulty adjusts downward to make 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 have to guess the exact number, they just have to be the very first person to guess any number that's less than or equal to the number I am thinking of.

"Let's say I am thinking about the number 19. If Friend A guesses 21they lose because 21>19. If Friend B supposes 16 and Friend C supposes 12, then they have both theoretically arrived at workable answers, because 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 informative post I present the'guess what number I'm thinking of' question, however I'm not asking just 3 friends, and I am not thinking of a number between 1 and 100. Rather, I'm 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 hard enough as is, here is the More about the author grab to the grab. Not only do bitcoin miners have to think of the right hash, they also must be the first to do 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 performed competitively on normal desktop computers. As time passes, 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 game.

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These can run from \$500 into 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 models of ASICs, the expense 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" .

An mining pool is a group link of miners that combine their computing power and split 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. .