As long as we can try to maybe minimize or even eliminate backdoors, centralization, viruses, bugs, Trojan Horses, other backdoors, remote control backdoors, takeover, termination, of the APPs, the DAPPs. For example, Bitcoin is good. Steem is good. Ethereum is ok. DAPPs can build on those blockchain systems. As long as they're decentralized enough. Facebook Libra is not a cryptocurrency, however, but instead is digital fiat.