Clark, what do you think about the Gemini Mastercard that pays rewards in Bitcoin?
How do you feel about frequent flier miles? You acculate enough for a round trip to Europe, then when you are ready to book, you find that they are not worth what you thought. Maybe more, maybe less. Bitcoin or the equivalent are speculative at this point. In the past you could lose it all as people scammed, places you had coin went away with your coins, etc. It is more regulated now, but I would not do anything like that.
A year or so ago I got $2,000 of Bitcoin and $1,000 of Etherium. Over that time my holdings dropped to $2,000 (1/3 down). Today I am at $3,100.53 today. So over the past 7 months I have been down 33% and up 3.33%. I do better at casinos.
Perhaps you are right. My comparison was meant to be that what you think you have in bitcoin one day can be drastically different the next. Airline miles may be worth a round trip one day and a one way the next.
Personally I would rather have a fixed amount of a reward.