Unfortunately not a lot of retailers accept Bitcoin in the U.S. You also create taxable events in the U.S. with any purchases with any crypto as none are recognized as a currency...yet.

You also have to take in consideration, is that a lot of bitcoin holders see the current value of BTC is still in its infancy stage so sadly it makes more sense to spend a fiat currency that continues to lose its purchasing power, rather than an asset that is believed to only increase in value exponentially in the near future.

Personally, i dont see an increase in the spending of BTC for daily purchases until at least salaries are paid in BTC. My dream world is to never have to touch fiat ever again, its a slow sometimes painful process but i do believe most here will see that day unfold.