Crypto's need a compelling use case to challenge fiat currencies. That use case will be found among the four billion people who currently have no access to banking services. Then, and only then, when crypto's have a dominant niche in huge but currently ignored markets, will crypto's become a threat to fiat currencies. Until then, I think that we can expect the "powers that currently be" to try to restrict the development of an inflation-proof, unmanipulatable alternative.