bitcoin is a future digital currency, i strongly believes that before BTC celebrate 50 years in existence at least one or two African countries is going to legalis it. because block chain network is expanding every day by day. and most of the countries in Africa have the knowledge BTC how it works.
As time goes by, I think before Bitcoin reaches 50 years old, more and more countries will definitely adopt Bitcoin. As technology becomes more sophisticated, payment systems will become more adaptable. However, there will be many ways or methods applied, it is possible that in the future there will be other breakthroughs, because what is being targeted is a super fast payment system. No one yet knows how sophisticated it will be in the next 10 years, but speculation so far is that CBDC is also continuing to try to be able to compete to upgrade because it can be controlled and developed.