Bitcoin isn't a currency by most textbook definitions. As Bitcoin is now, it will never replace fiat currencies because it is not a stable store of value (among other reasons). For now, Bitcoin is just another way to send fiat and something of an investment.<p>So Bitcoin fanatics who believe Bitcoin will replace fiat are wrong - unless they're willing to accept major changes to the system that go against their usual beliefs. (And even then, I doubt many governments would sit idly by, for good reason.) But for practical people who don't want to deal with buyer fraud, exorbitant fees, and lack-of-privacy, Bitcoin is great.<p>Buffett may be a killjoy and trying to preserve the current system which tends to benefit the wealthy and well-connected. I'd guess he probably has a lot of stake in that. But he is correct for now.