Never. Even if cryptocurrencies succeed on every possible metric, fiat currency markets will likely always be larger than crypto markets; if only due to the wider availability of fiat currencies for the general populace. Think about it -- even if the crypto market were as large as the stock market, the trading volume of fiat / crypto currency pairs would count toward the day-to-day volume of both crypto assets and fiat. So unless traditional stocks and bonds get more trades in crypto than in fiat, fiat will always be a step ahead.



"Blockchain the technology" is more often than not a term devoid of meaning, approaching vague problems with undefined solutions; so naturally this platonic ideal of a technology falls apart upon closer inspection.

Cryptocurrencies, a concrete application of blockchains, have left the lab a long time ago. And they are facing real world adversaries over and over again.