Buy a huge percentage of existing bitcoins and then sell each bitcoin for cheaper than you bought it for and cheaper than your previous sale. Given the entire currency is worth in the billions, nobody would do this, and there's nothing to gain from doing it.
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Buy a huge percentage of existing bitcoins and then sell each bitcoin for cheaper than you bought it for and cheaper than your previous sale. Given the entire currency is worth in the billions, nobody would do this, and there's nothing to gain from doing it.
You could also try to spook investors though, and make the confidence evaporate, possibly without having to spend much yourself.