Fiat money is an alternative 
Please show me how you transfer $ fiat from 3rd world country to your client or vendor in Europe or US within 3 -8 seconds with barely to no fees?
It depends on which 3rd world country you live in, if a coin with very low fee and instant transaction is listed on a local exchange, you can buy it with $ and send it to europe or us. As it is local exchange you probably deposit your money with no fee through your bank account?