Are you asking in terms of economics or technicals? Cryptocurrencies are distributed and basically impossible to take down or hack through the front door (as a

Are you asking in terms of economics or technicals? Cryptocurrencies are distributed and basically impossible to take down or hack through the front door (as an individual). They are less easily attributed to a person or owner. Virtual currencies are hosted and managed by some single entity, if they go bankrupt so do your points. They tend to not have value outside of where you can redeem them. Some businesses don't allow transferring of reward/loyalty points, which makes it illiquid.