Bitcoin slumped nearly 20% to $9000 hours after hittng its all time high of $11,000 stoking fears that bitcoin bubble might be ready to burst soon. Here are some facts that you might not know about the largest and best-known cryptocurrency. HOW MANY ARE THERE? Bitcoin's supply is limited to 21 million - a number that is expected to be reached around the year 2140. So far, around 16.7 million bitcoins have been released into the system, with 12.5 new ones released roughly every 10 minutes via a process called "mining", in which a global network of computers competes to solve complex algorithms in reward for the new bitcoins. ENERGY DRAIN These mining computers require a vast amount of energy to run. A recent estimate by tech news site Motherboard put the energy cost of a single bitcoin transaction at 215 kilowatt-hours, assuming that there are around 300,000 bitcoin transactions per day. That's almost enough energy as the average Americ...
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