I do not think that bitcoin will be enough if the whole people around the world will going to buy bitcoins. There will be too much shortage on bitcoin supply and this will lead also to have an expensive market price for bitcoin. As we all know that there are billions of people around the world and bitcoin supply is only limited. So meaning to say in the near future there will be a shortage for bitcoin supply and thus will lead to create another dominant coin like having ether as one of the possibilities that it will be the next to bitcoin. As of this moment i am seeing this already closely to happen. What do you think?
The shortage are already real now, there's not enough bitcoins now, that's why we pay in the thousands for one bitcoins and that's way some people say, bitcoins will go to 100k or even 1m within few years from now.
If every millionaire wanted to hold one bitcoin each, there wouldn't be enough for them either.
And top of that 4 millions bitcoins are missing and another almost 4 millions haven't been mined. And and just a few hundred wallets hold 80% of the rest of the bitcoins.
So it the crypto markets keeps growing the shortage will be massive in the years to come.