January 2, 2018   Dear Investor: Given the astronomical gains last year, many clients have understandably asked if they should purchase some Bitcoin. I would say no. Not because it’s a mania, a novelty, or a fad—though it certainly might be all of those things. I would say no for the same reasons I advised against buying companies like Pets.com in 1999. Not because it has no value, but because the value cannot be determined. I have no idea...