# The Buzz on Is Bitcoin Mining Profitable

In 2009it had been 50. In 2013, it had been 25, at 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 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 produce.

Here is the catch. In order for bitcoin miners to really earn bitcoin from verifying transactions, two things have to happen. First, they must confirm 1 megabyte (MB) value 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 shops.

Second, in order to put in a block of transactions to the blockchain, miners should solve a intricate computational science difficulty, also called a"proof of work." What they're doing is trying to come up with a 64-digit hexadecimal number, called a"hash," that's less than or equal 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 about 7,184,404,942,701. That is, the chance of a computer 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 roughly every 2 weeks, with the goal of keeping rates of mining constant.

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

"Say I tell three friends that 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 need to guess the specific number, they just must be Extra resources the 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 have both theoretically arrived 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'guess what number I'm thinking of' question, but I am not asking just three 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 of a 64-digit hexadecimal number. Now you see that it's going to be quite difficult to guess the right answer." .

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

Because bitcoin mining is essentially guesswork, arriving at the right answer before another miner has everything to do with how fast your computer can produce hashes. Just a decade ago, bitcoin miners could be performed competitively on normal desktops. Over time, however, miners realized that pictures cards commonly used for video games were more capable of 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 aggressive that it can only be done profitably using the latest up-to-date ASICs. When using desktop computers, GPUs, or older versions of ASICs, the cost of energy consumption actually surpasses the revenue generated. Even with the newest unit available, one computer is seldom enough to compete with what what miners call"mining pools" .

An mining pool is a group of miners who combine their computing ability and split 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 massive network of consumers verifying transactions, one block of transactions is verified roughly every 10 minutes. But its important to keep in mind that 10 minutes check this is a target, not a guideline.

#### The 7-Minute Rule for Big Coins

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