So if someone immediately converts it all to an asset (as many bitcoiners do) then you’ve answered the question of why you’d spend bitcoin on groceries. More than one way to skin a cat, and everyone I’ve known who goes that route seems to stay on that path.
Discussion
Umm ..good point .. but no one converts all fiat to bitcoin.. people still buy bread :-)
Besides , assets are many .. some like gold ..some stock ..some yatch !
Fiat , being a spending incentive , drives people to a free market .. with choice of consumables and multitude of assets ..
Spending bitcoin is a tax event !