Also buying goods on our super market using Bitcoin as direct payment is cool. Imagine you are going on the wet market to buy fresh fish while local sellers accepts Bitcoin payment for small purchase. I just hope that transaction fee that time will be cheaper through the use of more developed lightning network because there will be a problem on huge fee if this kind of mass adoption really happened.
Why don't you try to start a business now and do what you say, dude, the other merchants in different countries are already doing what you say even if it's a small business in traditional business.
Even in El Salvador, what you say is already being done as legal tender currency in this country apart from the plan you say. And I also think that everyone's acceptance of bitcoin is different in my opinion.