Yeah, each merchant decide for its own method.
If I would have a shop I will be very aggressive against fiat methods.
This is how I convinced in the past many of my clients, as a freelancer in IT.
I told them in 2016-2018:

• you start paying me in BTC, you get discount.
• For all the rest of fiat payments you will get a % increase.
• if you want to know more, all consultancy is free of charge, anytime 24/7

From 10 clients I had, 4 start accumulating BTC as "company reserve", as I advise them. From that reserve they start paying me. and slowly other employees.
Then they start accepting BTC for their services, first in private deals, later publicly.

Now they are happy that they listen to me. And they started, waaaaay before M.Salylor. Saylor is just a small holder. These companies were buying BTC when was really low in price... And what is more important, they pay their employees in BTC, not like Saylor that is just speculating with his stash.