Odaily News "Doctor Doom" Nouriel Roubini said in an interview: "Bitcoin is very volatile. If you want to preserve wealth, not high volatility, you should stay away from such assets." According to data compiled by Bloomberg, about $6.8 billion poured into U.S. ETFs that directly invest in Bitcoin in the period after Trump won the election. The total assets of these 12 ETFs are about $100 billion.