According to evolution of money, trade was first done with the barter system, then it evolved to commodity money using Gold and it's kind,then into metal coins then paper money, later transactions where done with plastic cards, before it's evolved into electronic money and now crypto currency.
About years ago El Salvador became the first country to adopt Bitcoin as a legal tender and there are speculations that other countries would also adopt it in the nearest future now my question is, with bitcoin being the leading crypto currency is there a tendency that it would become the generally used currency worldwide?
It is very likely that the general use of bitcoin is going to grow over the next years even with major governments regulating crypto currencies more closely. Bitcoins offer a lot of advantages for international cross border transaction and I think that many customers will switch to bitcoin instead of dealing in their local fiat currency. The main question is if corporations would switch too into the crypto world for their major transactions. Most of the international money transfers are being done by corporations and consumers make up a small fraction compared to that. So even if most consumers would only deal in bitcoins in the future, as long as the big companies don't do the same Bitcoin is not going to be a major used currency worldwide. But if almost every consumer would use it, then the companies would have to adopt and follow the demand of the consumers.
BTC being the general currency in the future is just being speculative. Other crypto currency perform as good if not better, with better gains than Bitcoin as it already is.
The number of users might be doubled if BTC after the coming halving in 2024, performs up to expectations and shows its consistency on top.
Countries that are wanting to tax BTC now, may be the problem of it being accepted as legal tender. Unless a miracle happens and unless fiat currency no longer serves gainful international transaction successfully, then would BTC have been a noteworthy solution.
It is a decentralized currency and until Web3, A.I, become dominant, cryptocurrency or BTC is still just around the corner making a swerve.