This is not to say cryptocurrency is any less important, meaningful, or useful. Rather, I think perhaps we have been judging cryptocurrencies’ success (or lack thereof) according to a false metric. We would not judge a fish by its ability to climb a tree. By design, cryptocurrency does not solve mainstream problems. Scale, speed, and cost are all examples of mainstream problems within finance, from main street to Wall Street. Credit card networks go down. Stock trades take days to clear. Wire transfers are expensive. In some situations, cryptocurrencies may offer marginal improvements on any of these issues, but more often blockchain-based systems will fail when compared to more conventional, centralized solutions.

https://www.coindesk.com/cryptocurrency-is-most-useful-for-breaking-laws-and-social-constructs?utm_term=&utm_content=