[knz]

> And after ten years, there isn't one actual application of cryptocurrencies except for speculation and crime.

Remittances - https://en.m.wikipedia.org/wiki/Remittance

There is a vast market for efficient, fast, and affordable methods of transferring money/wealth across political boundaries. Blockchain/crypto seems to be filling that niche for many people, myself included, without "speculation and crime" being a factor. There is no "remittance app" for it because you can do it with your pick of various widely available crypto coins and exchanges.