# Is Bitcoin Mining Profitable - Questions

In 2009, it was 50. In 2013, it had been 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 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 is the catch. In order to get bitcoin miners to actually earn bitcoin from verifying transactions, two things have to occur. First, they need to confirm 1 megabyte (MB) worth of transactions, which can theoretically be as small as 1 transaction but are more often a few thousand, depending on how much information 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 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, called 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. In other words, the chance of a computer producing a hash below the goal is 1 in 7,184,404,942,701 less than 1 in seven trillion. That amount is adjusted every 2016 blocks, or about every two weeks, with the goal of keeping rates of mining constant.

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

"Say I tell three friends I'm thinking about 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 figure any number that is less than or equal to the number I'm thinking of.

"Let us say I'm thinking of the number 19. If Friend A guesses 21, they lose because 21>19. If Friend B supposes 16 and Friend C guesses 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 More Info though B's answer was closer to the target answer of 19. .

"Now imagine 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. 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 extremely difficult to guess the right answer." .

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

Since bitcoin mining is essentially guesswork, arriving at the ideal answer before another miner has 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. Over time, however, miners realized that graphics cards commonly utilized for video games were 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. .

Today, bitcoin mining is so competitive that it can only be done profitably with all the most up-to-date ASICs. When using desktop computers, GPUs, or elderly models of ASICs, the expense of energy consumption actually exceeds 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 approximately 80% to 90% of bitcoin computing power. .

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Between 1 in 7 trillion chances, scaling difficulty levels, and the massive network of users 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.

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The bitcoin network can process about seven transactions per second, with transactions being logged in the blockchain each 10 minutes. As 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.