Big banks are taking notice too. Goldman Sachs (GS) has said it will begin futures trading in bitcoin contracts, a move that should ultimately be good for bitcoin and other leading cryptocurrencies that rely on blockchain.

Volatility may decrease, which isn't great for traders and speculators, but the involvement of Goldman Sachs and other big Wall Street firms is good for the long-term. Bitcoin is down this time, But it still may be the future of money.