If they force people to use electronic money and somehow remove cash completely it's going to increase Bitcoin adoption.
If not, I just don't see it happening. The only way people start using Bitcoin is if other ways of paying become more risky or less convenient.
Using crypto currency as a world currency can change the whole financial system of whole world. Let's go way back to the time we still have no currency and we are just trading any materials like gold silver and even animals. When crypto currency is used as a financial system of the whole world, that time will come back where we are trading but in the form of crypto currency so that we don't need to spend a lot of materials on making a money. Trading will be more common for everyone of us and the crypto currency subject will be added on every universities.
Source:
https://steemit.com/cryptocurrency/@s-johnathan/a-world-without-paper-money