What I am asking is that what needs to happen to trigger the governments, the big cooperations, or the people themselves to start using Bitcoin as a main Payment method?
In case of global massacre and nuclear war between US and China! Otherwise I don't see governments using bitcoin as a main payment method in our lifetime. It's not a preferred payment method for governments because they don't have ability to control it. So it's not gonna happen ever. Also bitcoin can't be scaled to that level where the world population would be able to use it. It would congest the network to such level, where everything will be stalled.
Bitcoin is not magic. It has its limitations and we must stay within that. It was never created to become the global currency or global payment method.