Bitcoin does not need to be legal tender to be used. If you think that it is prohibited and people can not use it in countries that it is not legal tender, you are misunderstand it.
Bitcoin is for underbanked and for everyone, in every country.
Legal tender is only one of things to bring Bitcoin to more people on social media. I think Bitcoin will be get accepted more without legal tender. However El Salvador is a good test for the world.
We are hearing this 10 years since the launch of bitcoin. Bitcoin doesn't need support of governments, its other way around. Most of big economic powers are still not in favor of decentralized bitcoin. Despite this opposition bitcoin has grown in terms of price, market cap and developing huge community.
Bitcoin is for underbanked and for everyone, in every country.
Globally, about 1.7 billion adults remain unbanked — without an account at a financial institution or through a mobile money provider. (source) While BTC is open for every single person on this earth. Thats the power of Bitcoin that's frighting big economic powers.