Bitcoin.
Exactly. One can't stay parabolic forever. At some point, there will be a correction (very normal).....but IMO there is more room to run for the time being ($150+). A lot of the new money coming into this.....Probably a mix of hot-money (with little tech savvy) and perhaps high-risk fund money, as others have insinuated. In the fund management world, I assure you that only very high-risk money (small %'s of VC type funds) will be flowing into this......your typical hedge fund will not be investing in this in the near future. I seriously doubt event-driven funds even know what BTC is, and 95% of private equity is way way too conservative to invest directly into BTC. VCs will be much more interested in investing in start-ups associated with BTC. And we are farther from BTC as an 'everyman system' than everyone is thinking.
Sorry for the double-negative, but there can't not be over-exuberance with BTC. The potential is too big for people not to get too too excited in the short-term. This rise, which will likely continue, will end up pricing perfection. Nothing is perfect or guaranteed. But hey, If the network effect can give FB a $100B market cap, perhaps the network effect can give BTC something similar......I am a believer, but a realist in that nothing goes up forever and some point we will get way way over-extended (where, who knows?). That's just the nature of the game.....