in present bitcoin is spreading too fast.though all people of world not using bitcoin but in the future bitcoin will spreas more & more. Many country will accept bitcoin like fiat and many store,shop will accept bitcoin as a payment method. So,bitcoin will be more popular in future.
Hopefully. When people understand the ease of use and the financial benefits that it can bring there will be more places accepting the currency.
I have bought some bitcoin a few years ago. I am using some of the bitcoin all the time to buy some goods to help adoption.