Any card does not return me 1% in crypto tokens

My strategy is based on automatic recharges. I shop with fiat or buy crypto with the preloaded balance.

However, your example has reminded me of an idea that some banks already do: Rounding.
You buy something for €27, the bank charges you €30 and the rest sends it to a different address of your property. A kind of self-saving.
Replace "send to another address" to "buy XX crypto" and there you have a great suggestion