It's possible that there are people who have both the crypto background and the economics backgrounds to "fully" understand bitcoin, but even then, the market is ultimately driven by humans and is an irrational and unpredictable beast.

And if Buffet is wrong on bitcoin, so what? He's still Warren Fucking Buffet.

I assume what was meant was "all the implications", not "all the technical details." There probably are people who fully understand the latter.

I was mainly thinking about the economics (nobody fully understand economics -- in fact predicting economic outcome is rare enough as to be celebrated in the economic world). But again, nobody fully understands crypto either: crypto algorithms such as RSA are considered secure because no effective attacks as been found against them despite many people trying, not because of some intrinsic properties or formal proofs.