New York (CNN Business) Bitcoin prices have doubled in less than a month to more than $40,000. And while cryptocurrency bulls argue this stunning surge is justified, some on Wall Street are warning that this won't end well. bitcoin XBT The recent rally may be another case of speculative mania looks like "the mother of all bubbles" according to Michael Hartnett, chief investment strategist at Bank of America Securities. Those sectors all enjoyed triple-digit percentage gains before crashing down to earth. More recently, Chinese stocks, biotechs and the FAANGs of Big Tech have also posted gigantic gains.

Source: CNN January 08, 2021 17:48 UTC