Expand from coffee to hamburgers, to gas station purchases, to groceries, etc, and soon you have ruled out a major percentage of the consumer economy. Not a deal breaker, but lots of hype for crypto is how it can replace fiat transactions wholesale or damn near it.

> The benefits of a blockchain over traditional financial systems is borderlessness and censorship resistance.

That's a subjective viewpoint. I might just want to earn my salary in Bitcoin and spend it, like a currency.