crypto OG / bitcoin OG / "OG" (sic)
An active member of the crypto community since 2013 or earlier. A proper OG visibly contributed to the scene socially and/or technically and established an identity/reputation among the OG community. There were so few enthusiasts back then that simply taking part in IRC discussions or btctalk shitposting was meaningful activity.
Synonyms: geezer, coot, bagholder, scammer