Good idea, but for me too often you take a transport car and pay with crypto what is excessive while the fiat money in your pocket is spent on more expensive goods. For me it's not a problem, but how about paying with fiat directly it's easier for you to put it next to the driver and leave.
I agree. I'd rather use crypto for puschasing bigger/more expensive goods or while doing internet shopping. When you are in a hurry to reach somewhere, using FIAT or credit card is more practical. When time isn't a problem, crypto can be used. The main limiting factor here is "time". Some crypto are faster but i still don't think crypto is ideal for everyday use.