I mean it still kind of matters where your keys are if the market turns illiquid. Its the difference between losing an asset and not.

I can definitely see a lot of cryptocurrencies losing a ton of a value but they do have a legitimate use for remittances. If you're transferring $1000 it doesn't matter if you convert it into 1 bitcoin or 100 bitcoins since your wife is cashing it out the next day for 20,000 pesos.