Also , the basic cryptocurrency stuff is basic PKI with signing. Plus a version of Kademilla plus a database linking records with hashed previous records and th

Also , the basic cryptocurrency stuff is basic PKI with signing. Plus a version of Kademilla plus a database linking records with hashed previous records and the infamous PoW. Nothing really fancy computationally. The "genious" of Nakamoto was to put all the existing parts together. But hashcash was there, kad/BitTorrent were there, chained append only DBs were there, etc.