Jamie Dimon, the CEO of JPMorgan Chase & Co (NYSE:JPM), is known for his no-holds-barred attacks on Bitcoin (CRYPTO: BTC), despite the banking giant's investments in exchange-traded funds tied to the leading cryptocurrency. What happened: Speaking at an investor conference almost exactly seven years ago, Dimon dubbed Bitcoin as "fraud" and "worse than tulip bulbs," in reference to the Dutch tulip mania in the 17th century. Don’t Miss: 1 in 4 Americans own a share of Bitcoin according to NASDAQ,