With the widespread use of Bitcoin now, El Salvador's move has become a start. Bitcoin is recognized by the government and used as legal tender, which means that Bitcoin is also likely to become money in the future. It may be a matter of time, but we This generation can't wait.
El Salvador wanted to get benefits of popular topic being first and attracting true Bitcoin supporters and they've got some effect they hoped for. To become a popular currency worldwide Bitcoin needs more: first to solve problems of scalability and transaction time. LN is a good but not universal answer. Next it should be enough popular and competitive to replace any of popular anchor currencies, as for now it is not yet, and governments prefer to operate their own inflationary currencies as they make financial administration easier and give an option of hiding financial mistakes. So probably someday but I don't think that the same way as in El Salvador which even doesn't have an own national currency.