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.
with the passage of time bitcoin users will continue to grow in the future, when the need for something requires a lot of money then the withdraw money through the bank have maximum limit and restriction policy will bring the money that will be key to success bitcoin in the future.