nostr:npub1wv79gfl4tn46qxs0vcr6kr73rqethvna0kchk4cw06mmdzsgrkdqmkxye0 teaching basics of #bitcoin

nostr:note1swn64zepwze0wjdsnr3d70s54p30vrwezz50dj300kqaqy89a9fs4fd54k