# Some Known Questions About Is Bitcoin Mining Profitable.

In 2009it was 50. In 2013, it had been 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 speed of halving, the entire 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 is the catch. In order to get bitcoin miners to really earn bitcoin from verifying transactions, two things must happen. To begin with, they must verify 1 megabyte (MB) worth of transactions, which can technically be as small as 1 transaction but are far 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 must solve a intricate computational math problem, 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'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 computer producing a hash below the goal is just 1 in 7,184,404,942,701 less than 1 in 7 trillion. That amount is corrected every 2016 blocks, or about every two weeks, with the goal of keeping rates of mining constant.

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The reverse is also correct. If computational power is 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 I write that number on a sheet of paper and seal it in an envelope. My friends don't have to guess the specific number, they just must be the very find more info first person to figure any number that's less than or equal to this number I'm thinking of.

"Let us say I am thinking of the number 19. If Friend A guesses 21, they lose because 21>19. If Friend B supposes 16 and Friend C supposes 12, then they have both theoretically arrived 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 pose the'imagine what number I'm thinking of' question, but 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 prospective miners and I am thinking about a 64-digit hexadecimal number. Now you see that it's going to be extremely difficult to guess the right answer." .

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

Because 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. Only a decade ago, bitcoin miners could be carried out competitively on normal desktop computers. As time passes, however, miners realized that pictures cards commonly utilized 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. .

Today, bitcoin mining is so competitive that it can only be done profitably with all the latest up-to-date ASICs. When using desktop computers, GPUs, or elderly models of ASICs, the cost of energy consumption actually exceeds the revenue generated. Even with the newest unit available, one pc is rarely enough to compete with what what miners call"mining pools." .

An mining pool is a group 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. .

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 target, not a guideline.