Goodmorning Mathieu,

Congratulations on adding your first merchant. Everything is neatly in place. Two small points for improvement:

Tag "payment:cryptocurrencies=*" is a generic tag for any cryptocurrency. This should be mainly used when cryptocurrencies are NOT accepted. If cryptocurrencies are accepted, like Bitcoin, use the specific key.

Tag “source=*” can be used to indicate the source of some information added to OpenStreetMap. This tag could be useful for verification and to assist future editors who may wish to understand the origins of the data they are modifying. 
The tag “source=BTCmap verification form” I use as a volunteer at BTCmap, when I am making edits based on our ticketing system.

Happy mapping,

Edwin