Jamie Dimon has a point though -- the governments will step in to regulate, if not block, the crytocurrencies.

However democratic the crytocurrencies themselves are, they are meaningless if they are not exchangeable with our fiat currencies, and fiat currencies ARE CONTROLLED by the governments.

Hypothetically, if any country wanna protect their own currency, they could just declare buying crytocurrencies as illegal, which could impair the value of crytocurrencies overnight.