Blockchain as many would say is one of the greatest inventions that man has ever made/created (shout out to Satoshi!). I wouldn't be surprised if the governments do make use of it in the future. Crypto on the other hand would definitely stay for a long time as it is said to be in its infancy. But will it stay and take the place of fiat in the monetary system is still a HUGE question...All we can do really is wait.