If the crypto currency is getting more popular, more and more people are using it, and even if the whole world uses it, it's not the amount of bitcoin that needs to increase, but bitcoin will divide, so even though the number increases it will be enough to meet everyone's needs. This means that bitcoin value will be more expensive.
I agree with you. that crypto will someday be the main choice to invest and hopefully can be a tool of transactions around the world.
Yes, I think Crypto has a very bright future, I see very clearly Crypto fans are getting more and I think Crypto is a modern way of payment so I'm very confident as time goes by Crypto will get bigger in the future.