So what do you think the reasons are for this massive bull run / bubble? If it's the (Chinese) upper class willing to invest (which has been posited here before IIRC), I doubt it'll evaporate overnight.
Them there Winklevii are getting their futures contracts. It ain't just nerds anymore, it's bloomberg terminals. So instead of nerds willing to put up with Coinbase, it's business majors and eTrade twits.
I've talked to two people who dumped out of BTC in the past 24 hours. One told me he'd been unable to sleep for two days because he knew when the bottom came out, it would just rip.