Before Bitcoin: The Forgotten Cryptos That Almost Made It!
E-Cash: Early digital currency by David Chaum failed to gain traction despite interest from major banks. Bankrupted in 1998
Bit Gold: Nick Szabo's precursor to Bitcoin introduced decentralization and Proof-of-Work but never gained widespread adoption
HashCash: Developed by Adam Back for spam prevention, faced scalability issues and didn't become a successful digital currency