# Trading Bitcoin Futures for Beginners

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 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 costly for miners to make.

Here's the catch. In order for bitcoin miners to really earn bitcoin from verifying transactions, two things have to happen. First, they need to confirm 1 megabyte (MB) value of transactions, which can technically be as little as 1 transaction but are more often several thousand, depending on how much data each transaction stores.

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Second, in order to add a block of transactions to the blockchain, miners should solve a complex computational math problem, also called a"proof of labour ." What they're doing is trying to think of a 64-digit hexadecimal number, called a"hash," that is less than or equal to the target hash.

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In other words, it is a gamble. .

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 1 in 7,184,404,942,701 less than 1 in 7 trillion. That amount is corrected every 2016 blocks, or roughly 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 from this network, the difficulty adjusts downward to make mining simpler. .

"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 have to guess the specific number, they simply have to be the very first person to figure any number that's less than or equal to this 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 guesses 16 and Friend C guesses 12, then they've both technically came 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 goal answer of 19. .

"Now imagine I pose the'imagine what number I am thinking of' question, but I'm not asking only 3 friends, and I'm not thinking of a number between 1 and 100. Rather, I'm asking millions of prospective miners and I'm thinking of a 64-digit hexadecimal number. Now you see that it is going to be quite hard to guess the ideal answer." . find more information

If 1 in seven trillion doesn't sound difficult enough as is, here's the grab to the website here grab. Not only do bitcoin miners have to come up with the ideal hash, but they also must 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. 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.

These can run from \$500 into the tens of thousands. .

Today, bitcoin mining is so aggressive it can only be done profitably using 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 available, one pc is seldom enough to compete with exactly what miners call"mining pools." .

A mining pool is a group of miners who combine their computing ability and divide the mined bitcoin between participants. A disproportionately large number of blocks are mined by pools rather than by individual miners. In July dig this 2017, mining pools and companies represented approximately 80% to 90 percent of bitcoin computing power. .

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Between 1 in 7 trillion odds, scaling difficulty levels, and the huge 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 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 users continues to grow, but the number of transactions made in 10 minutes will eventually exceed the number of transactions that can be processed in 10 minutes.