In my opinion, currently, bitcoin is an investment of economic and financial value. And in the future bitcoin will no longer be an investment but will become a global currency that will be used by all people around the world.
I disagree with your opinion, although in the future bitcoin is widely used for buying and selling transactions, but to be a global currency, I think that is impossible, because bitcoin is not stable can rise and fall anytime so bitcoin will be difficult to become a currency global.