"cryptomoney scam wallets" have likely secured many more deals with offline verification signatures over the past 5 years than PGP has over 25 years. no need to conflate that with transactions and value transfer. its just public and private key cryptography and inherits everything that PGP offers.
this algorithm has failed to proliferate outside of thin security conscious niches for an entire generation of internet users, and has been leapfrogged.