Hey,
I have been investing in some btc recently and i have seen that in my country i can pay for example in a pizza restaurant (when i order online) with online coins.
Do you think that btc will become the future currency of our world?
Yes but not the main currency, government still need to have national currency to become one of instruments to control country economy. Bank and national currency has to still exist because industries need capital from people who save their money in bank.