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.
Gold had triumphed in its time and was once used as a barter system in buying and selling and then it was also used as currency. However, along with the development of the era, paper money began to be created and the previous payment system was abandoned according to its time, however, there was a process from the emergence to the end of the heyday of the previous payment system.
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?
At least until now we are still using fiat currency as a means of transaction and can never achieve mass adoption regarding bitcoin as the leading currency in the near future. Maybe we will see payment systems using fiat currencies will decrease and the adoption of bitcoin in the future will increase as we have seen in people's trust in investments. Nothing is impossible and if gold once was bartered in buying and selling or was the currency of its era and it is likely that bitcoin will reach that level in the future.
The tendency to become a common currency that is used for the whole world using bitcoin is still not possible and needs a process to reach that stage. It's not as easy as we imagine that in the future bitcoin will become a global currency used by most countries. For now still quite Impossible?