Fully decentralized p2p cryptocurrency transactions without double spending by proof of work (improvement upon Hashcash) was done first with Bitcoin. The term fintech did not exist at the time. EDIT: looked it up, apparently first use as Fin-Tech was 1967 https://en.wikipedia.org/wiki/Fintech – it’s not the current use of the term though.
Fully decentralized p2p cryptocurrency transactions without double spending by proof of work (improvement upon Hashcash) was done first with Bitcoin. The term fintech did not exist at the time. EDIT: looked it up, apparently first use as Fin-Tech was 1967 https://en.wikipedia.org/wiki/Fintech – it’s not the current use of the term though.