theres an equal but opposite reaction where spenders will always prefer to transact with something else.
given the option to delay discretionary spending or use Bitcoin they will tend to delay spending.
Merchants will choose to accept other currencies rather than just not make a sale at all.
So no
I don't think the hard cap helps promote Bitcoin as a MoE.
I think it incentivizes creating a fractional L2 to use as MoE instead.