EDIT: To be clear, I mean tourists each individually buying a normal amount of things using BTC, which adds up to the store exchanging it's inventory for a number in the app.
I suspect more likely some rich people will find it more convenient to pay their tax bill.
I'm actually curious how this will be implemented specifically. I guess (although I'm not well-informed on the ecosystem) that most of the places that let you do small cryptocoin transaction either use some smaller coin, or they must have some way of doing fractions of a bitcoin, right? In which case, the fraction system would have to be proprietary, I guess? I can't imagine the law required shopkeepers to use any particular proprietary exchange...
Its fundamental unit it the "Satoshi", of which there are 100 million in a "Bitcoin".
[1] https://u.today/el-salvador-government-to-punish-businesses-...
> every economic agent must accept bitcoin as payment when offered to him by whoever acquires a good or service
https://theconversation.com/bitcoin-will-soon-be-legal-tende...
https://twitter.com/nayibbukele/status/1402446890466217985
Art. 7 states "Every economic agent must accept bitcoin as payment when offered to him by whoever acquires a good or service".
So it goes beyond merely saying it's "legal tender".