President Faustin-Archange Touadéra signed the measure into law, his chief of staff, Obed Namsio, said in a statement.
The CAR is one of six central African countries that share the CFA franc — a regional currency that is backed by France and pegged to the euro.
After a relatively calm 2020, the cryptocurrency experienced wild swings in 2021, surging from under $33 000 at the start of the year, peaking at over $67 000, before returning to $35 000 in February.