If btc is legally accepted in all countries then huge number of investors will increase. and the use of btc in various fields will increase.
what is your opinion about this?
It is highly imposible that all countries will adopt bitcoin as legal tender.
because every country already has a legal tender in the form of currency that is used as a means of payment.
If bitcoin is used as a legal tender, it can kill the country's local currency.
What about El Salvador ( the first country who made it possible ) and the other two countries who followed their foot steps? I'm sure they also have a currency which is a legal tender before they gave BTC the same status. They are a proof that it can also happen to the rest but we should be patient because it can take some time. They say that two is better than one.
So, if we already have alternative payment methods, then why can they just maximize their potential? Even them didn't kill the countries main currency so what is the difference of BTC? People will just use them equally or there will still be more people that will use the common/traditional ones.