As I was a student, I wondered that only state could issue money. What if this state is corrupted? Or stop existing? I realized that it seems like all people only imagined that their money has real value because in fact, it was not so.
Today any person may create a currency and that is rather a challange than a problem. However, it seems like people trust each other more than it was  10 or 20 years ago. And it seems like all the limits are gradually disappearing. We already have smart contracts, the possibility to buy and sells goods using cryptocurrencies, and what is more important - we have a freedom and opportunity to choose what we like or not. Basically, the sum of those choices designs the future.  I think that decentralized communities would win and the states in classical meaning would finally collapse.