In 2030 we could see bitcoin as world currency
When the popularity of crypto would be really big, then it's really probably. I'm waiting for it.
I'm always amused by people making such crude estimations. We can't be sure what will happen to bitcoin even in 2019. No question, can't we predict anything for over a decade in advance.
It's not like we are seers to see into the future and what humors is that when they give their assumptions, they don't have anything to back them up at all. I am still optimistic and will continue to invest and hope for the best.