What are the chances of living in a world with no actual money ? 
Low. I think personally that cryptocurrencies wont make FIAT useless, but I think that cryptocurrencies will work hand-in-hand with FIAT money. Especially in countries like the United States, and the other first-world countries; I don't see FIAT going anywhere soon.
Yes the possibility is very low becs. There are people who do not have access in compueters. In our country it is very hard there are only 2M who joined btc. Maybe both can be use.