Probably not. Most likely Brazil has chosen to regulate, not adopt, Crypto. I'd avoid reading more into that article than is there. No nation with firmly established institutions, a well functioning central bank, and that issues its own currency is going to make Crypto legal tender, assuming they know what they are doing. But start regulating crypto, yes they might do that. Crypto is a means of payment that depends on cyber space. Those that have unfettered access to the internet will be able to use it as they see fit. No law is needed to allow that. Any laws will in be in the nature of regulation or banning crypto.
Nevertheless there will be a plethora of articles predicting this or that nation may adopt crypto. The won't.
