Its really much easier for us to adopt cryptocurrency in the future knowing it doesnt need to convert in any other currency and is acceptable worldwide. Other aspects like political,military etc. Will follow.
Even if crypto is already accepted in the future , will still be needing to convert our money to cryptos and cryptos to money ( vice versa ) because we will still be needing a money especially if we will shopping locally ( on local stores where crypto is not accesible ) we also be needing money to be able to buy a crypto . the problem of getting bitcoin in the future will be slightly harder because the price will be more expensive .