# Trading Bitcoin Futures for Dummies

In 2009, it had been 50. In 2013, it had been 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 speed 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 expensive for miners to make.

Here is the catch. In order to get bitcoin miners to actually earn bitcoin from verifying transactions, two things must occur. To begin with, they need to confirm 1 megabyte (MB) worth of transactions, which can technically be as little as 1 transaction but are far more often several thousand, depending on how much information each transaction shops.

Second, in order to put in a block of transactions to the blockchain, miners must fix a complex computational science difficulty, also referred to as a"proof of work" What they are doing is trying to think of a 64-digit hexadecimal number, known as a"hash," that's less than or equivalent 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 all about 7,184,404,942,701. In other words, the chance of a computer producing a hash below the goal is 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 goal of keeping rates of mining constant.

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

"Say I tell three friends that I'm thinking of 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 have to guess the specific number, they just have to be the very first person to guess any number that's less than or equal to this 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 visit this website guesses 16 and Friend C guesses 12, then they've both theoretically arrived at workable answers, 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 that I pose the'imagine what number I'm thinking of' question, but I'm not asking just three friends, and I am not thinking of a number between 1 and 100. Rather, I am asking millions of would-be 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's the catch to the catch. Not only do bitcoin miners have to come up with the right hash, but they also must be the first to do it.

Since bitcoin mining is essentially guesswork, arriving at the right 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 carried out competitively on normal desktop computers. Over time, however, miners realized that graphics cards commonly utilized for video games tend to be more effective at mining than desktops and graphics processing units (GPU) came to dominate the game.

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

Nowadays, bitcoin mining is so competitive that it can only be done profitably with all the latest up-to-date ASICs. When using desktop computers, GPUs, or older models of ASICs, the cost of you can find out more energy consumption actually exceeds the revenue generated. Even with the newest unit at your disposal, one pc is seldom enough to compete with exactly what miners call"mining pools" .

A mining pool is a group of miners that 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 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 massive 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 guideline.

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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.