Just about everyone has questions about bitcoin these days, including Jeffrey Gundlach's 86-year-old mom.
But the cryptocurrency is not something that Gundlach himself is ready to participate in.
Not everyone agrees, including Mohamed El-Erian, Allianz's chief economic adviser. He told CNBC on Wednesday that he didn't think governments would allow the massive adoption that traders have priced in. Bitcoin should be worth "at least half" of its current price, he said.