I have to go with Warren Buffett on this one, a really smart guy who's worth $75 BILLION. Buffett said... Bitcoin isn't gonna end well! That's good enough for me!
I'll avoid cyber money for WB's reasons. But, that said, downfalls are a great opportunity for the not so faint of heart. Assuming you have some time on your hands, of course. I maxed out my 401K contribution in '08 when many my coworkers were bailing out. Now I can afford to be retired, as long as I don't go crazy. As in no paint jobs on my projects.