Quote:
Originally Posted by lezinterracial
As the blockchain gets bigger, And less people are downloading the whole chain (ie using coinbase and mulitbit). Is it possible for someone to take over the blockchain?
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It is, its called a 51% attack. If you have 51% or more of the network, you can fake transactions.
Currently i am told it would cost around 500 million in hardware to do this. And if you had 500 million in mining hardware, it would be more profitable to just mine and earn bitcoin that way.