You sound like a Keynesian. People will naturally use Bitcoin however it benefits them most. Right now, for most people in the West that means saving it for the future. It is irrational to use a rapidly appreciating asset for purchases unless you have no other option. And yes, you can spend and replace, but there is friction to some degree there. I do spend Bitcoin on occasion, but my point still stands. Saving Bitcoin is using it. 

 a Keynesian? what is that?

agreed that not everyone has the "luxury" to spend their sats. I say that in quotes because 1BTC = 1BTC at any time, most holders don't want to spend it because they're always comparing it to an inflationary currency (USD, EUR, ...)

but holders of Bitcoin who can spend it, should do it as much as possible, otherwise Bitcoin is just a gimmick, instead of an actual currency