Bitcoin, a peer to peer electronic cash system that don't rely on a central trusted third party.

nostr:nevent1qqs2pey2jhpuxjnd9kq0qhtfzxuex5vawezkn428nj7y4uw2wn2rancpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsygpl8lm6mvu3t8zzcz4pd4fuqjpml0ad2l0j920faymy5vr8g84jeupsgqqqqqqsrnrhv2