Regarding OneCoin, its a scam. Real cryptocurrencies are traded on exchanges, whereas OneCoin is only sold by Bulgarian con artists. This is the wikipedia page on it. https://en.wikipedia.org/wiki/OneCoin | Also, encryption in the context of cryptocurrency is not the process of creating hard-to-replicate code, it is the process of using hard-to-reverse code to generate a unique public key from two values, a known constant generator and a private key. If the encryption is good, the private key cannot be derived from the public key, so it is hard to masquerade as another user and steal their coins. OneCoin has no decentralized network encryption because it is managed entirely on a central server created by pyramid scheme artist Ruja Ignatova.