# The Only Guide for Trading Bitcoin Futures

In 2009, it was 50. In 2013, it was 25, in 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 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 produce.

Here's the catch. In order to get bitcoin miners to really earn bitcoin from verifying transactions, two things must happen. To begin with, they need to verify 1 megabyte (MB) value of transactions, which can technically be as little 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 should solve a complex computational math problem, also called a"proof of labour ." What they are actually doing is trying to think of a 64-digit hexadecimal number, called a"hash," that is less than or equal to the hash.

In other words, it's a gamble. .

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 pc producing a hash below the target is just 1 in 7,184,404,942,701 less than 1 in seven trillion. That level is corrected every 2016 cubes, or about every 2 weeks, with the aim of keeping rates of mining constant.

The opposite is also correct. If computational power is taken off of the 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 that 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 simply must be the first person to guess any her response number that is less than or equal to the number I am thinking of.

"Let's 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 viable answers, because 16<19 and 12<19. There's no'extra credit' for Friend B, even though B's answer was closer to the goal answer of 19. .

"Now imagine that I present the'imagine what number I'm thinking of' question, however I am not asking just 3 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 about 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 hard enough as is, here is the catch to the grab. Not only do bitcoin miners need to come up with the right hash, 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 create hashes. Only a decade ago, bitcoin miners can be carried out competitively on normal desktop computers. As time passes, however, miners realized that graphics cards commonly used for video games were more capable of mining than desktops and graphics processing units (GPU) came to dominate the match.

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

Nowadays, bitcoin mining is so competitive that it can only be done profitably with the most up-to-date ASICs. When using desktop computers, GPUs, or older versions of ASICs, the expense of energy consumption actually exceeds the revenue generated. Even with the newest unit at your disposal, one computer is seldom enough to compete with what 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 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 also the massive network of consumers verifying transactions, one block of transactions is confirmed roughly every 10 minutes. However, its important to remember 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 each 10 minutes. Since the network of bitcoin users 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.