BTC futures expire Jan 18th that's the reason for the market sell off, there's a massive short position by banks and institutions and they will be in the money.
JPM and GS were buying BTC last year only to leverage on exchanges and short BTC, they don't want your cryptos, they don't give a flying fuck about any of these, they just want your money and a lot of traders have done just that.
Crypto heads (including me) will get a taste of what the pm stackers have been dealing with for decades, market manipulation by big banks.
Learn how to trade the market on a monthly cycle.