Some people think crypto is a store of value. For them it would be a nonsense to use crypto instead of fiat, which no one argues is a store of value as it is unapologetically merely a medium of exchange, to buy their Corn Flakes.Yes in a way but then again it was still crypto translated to euro
Possibly you do not think it is a store of value which makes me wonder why you have it in the first place. Also it is surely inefficient to be going through an exchange swap every time you go shopping.
On reflection I could see a logical position where you believe crypto is a store of value and yet you exchange it to € to buy your Corn Flakes. That would make sense if you had no source of fiat, or more realistically if you immediately convert all sources of fiat to crypto. This would be similar to @argolis point, that maybe some folk convert all their € income to $ as soon as they receive it.
I didn't fully understand the crypto money tree you seem to have found - I guess you have given up the day job.