Tell me, what kind of payment processor do you know that will work in many countries? I think this information will be useful for the project.
Even bank transfer do not work in all the countries. It is very expencive and there are a lot of intrmediaris. But besides there are a lot of sunction and banks do not work with some countries.
I agree that cryptocurrency has a lot adventages in compare with traditoinal fiat money. But state autorities wants to control cryptocurency how they contrall banks.
The states authorities has already started to control cryptocurrency. Verifications on exhanges and investors of ICO. It is one of the reason why the price of cryptocurrency start to fall down in 2018.
It was not inevitable. In order to protect the market from fraudsters. But unfortunately many people will take away their money from cryptocurrency for various reasons.