Well that's kind of a bad comparison, since Yen isn't my local currency and yet it has been useful to me when I was visiting Japan. I could buy it for a reasonable price in my current country, in basically any airport or bureau de change around the world. I could easily withdraw Yen from an ATM when in Japan, could buy things anywhere in the country with Yen and then switch back the couple-thousand I couldn't spend at Duty Free when I returned home.

Hearing that crypto may not be for me is quite surprising. It is advertised to me all over the place and the various stereotypical "cryptobros" seem curiously keen on people like me buying into the ecosystem, and appear to be very generously interested in helping me go "to the moon" etc. I've no idea how you're doing those things with crypto. I guess you have to go pretty far out of your way to buy, for example, airfare with a cryptocurrency or make otherwise really inconvenient trade-offs. I guess you might be semi-forced to use it due to, for example, living in a country with a currency which is more unpredictable than BTC then I think that's more of an black mark against the local currency than it is a feather in BTC's cap...