# Coins For Sale for Dummies

In 2009, it was 50. In 2013, it was 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 speed 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 produce.

Here is the catch. In order for bitcoin miners to really earn bitcoin from verifying transactions, two things must happen. First, they must verify 1 megabyte (MB) worth of transactions, which can technically be as small as 1 transaction but are more often several thousand, depending on how much information each transaction shops.

# Fascination About Is Bitcoin Mining Profitable

Second, in order to add a block of transactions to the blockchain, miners should solve a intricate computational math problem, also referred to as a"proof of labour ." 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 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 goal is 1 in 7,184,404,942,701 less than 1 in 7 trillion. That level is adjusted every 2016 blocks, or roughly every 2 weeks, with the aim of keeping rates of mining constant.

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

"Say I tell three friends that I'm thinking of 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 simply must be the first person to figure any number that's 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 supposes 12, then they have both technically came at workable answers, check that since 16<19 and 12<19. There is no'extra credit' for Friend B, even though B's answer was nearer to the goal answer of 19. .

"Now imagine I pose the'guess what number I'm thinking of' question, but I'm not asking only three friends, and I'm not thinking of a number between 1 and 100. Instead, I'm asking millions of prospective miners and I'm thinking of a 64-digit hexadecimal number. Now you see that my blog it is going to be extremely hard to guess the ideal answer." .

If 1 in 7 trillion doesn't sound hard enough as is, here is the catch to the catch. Not only do bitcoin miners have to think of the ideal hash, they also must be the very first to do 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 create hashes. Just a decade ago, bitcoin miners can be performed competitively on normal desktops. Over time, however, miners recognized that graphics cards commonly utilized 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 with the latest up-to-date ASICs. When using desktop computers, GPUs, or Resources elderly 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 power and divide the mined bitcoin between participants. A disproportionately large number of cubes 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 also the huge network of users verifying transactions, one block of transactions is verified roughly every 10 minutes. But its important to remember that 10 minutes is a goal, not a rule.

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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.