# What Does Trading Bitcoin Futures Mean?

In 2009, it was 50. In 2013, it was 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 total number of bitcoin in circulation will approach a limit of 21 million, making the currency more scarce and valuable over time but also more expensive for miners to produce.

Here's 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) value of transactions, which can technically be as small as 1 transaction but are more often a few thousand, depending on how much information each transaction shops.

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Second, in order to put in a block of transactions to the blockchain, miners must fix a complex computational science difficulty, also called a"proof of labour " What they're actually doing is trying to come up with a 64-digit hexadecimal number, called a"hash," that's less than or equal 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. In other words, the chance of a computer producing a hash beneath the goal is 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.

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The reverse is also correct. If computational power has been taken from the network, the difficulty adjusts downward to earn mining easier. .

"Say I tell three friends I'm thinking of a number between 1 and 100, and that I write that number on a piece of paper and seal it in an envelope. My friends don't need to guess the exact number, they simply must be the first person to guess any number that's less than or equal to the number I am thinking of.

"Let's say I'm thinking of the number 19. If Friend A guesses 21they lose because 21>19. If Friend B supposes 16 and Friend C guesses 12, then they have both technically this contact form 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 target answer of 19. .

"Now imagine I present the'guess what number I am thinking of' question, but I'm not asking just 3 friends, and I am not thinking of a number between 1 and 100. Instead, I am asking millions of prospective 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 hard enough as is, see here's the catch to the catch. Not only do bitcoin miners have to think of the right hash, but they also have to be the very first to do it.

Because 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 performed competitively on normal desktops. As time passes, however, miners realized that pictures cards commonly used for video games tend to be 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 into the tens of thousands. .

Today, bitcoin mining is so aggressive that it can only be done profitably with all the most up-to-date ASICs. When using desktop computers, GPUs, or elderly versions of ASICs, the cost of energy consumption actually surpasses the revenue generated. Even with the newest unit at your disposal, one pc 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 split 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% of bitcoin computing power. .

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Between 1 in 7 trillion odds, scaling difficulty levels, and the huge network of users verifying transactions, one block of transactions is confirmed 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. As the read what he said 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.