Making Bitcoin a legal tender means when a person goes to purchase a commodity, instead of paying with dollar or whatever currency is being used, they pay with BTC.
Given the unstable nature of cryptocurrencies, and the untraceable nature, would you suggest it wise for countries to adopt Bitcoin as a legal tender?
Recently, El Salvador and Central African Republic announced that they have adopted Bitcoin as a legal tender.
You don't actually need to make Bitcoin legal tender for it to have major presence. Legal tender status gives you the ability to pay off debt to the government or a private party with whatever currency. I'm not against making crypto legal tender, but it's not a large hurdle.
Most transactions aren't facilitated to or by the government, so it doesn't matter much if you can't pay off a government debt with Bitcoin. That still gives you the ability to pay all private debt with Bitcoin, and most transactions in a free economy are done privately to begin with.