In 1983, an American Cryptographer David Chaum conceived an anonymous Cryptographic electronic money called e-cash. Later, in 1995, he implemented it through Digicash.
David Chaum
In 2009, the first decentralized Cryptocurrency, Bitcoin, was created by Satoshi Nakamoto (however, the creator remains anonymous). Bitcoin is open-source; its design is public, nobody owns or controls Bitcoin and everyone can take part.
Bitcoin
October 2011, Litecoin was released, it used scrypt and another notable cryptocurrency, Peercoin, used a proof-of-work/proof-of-stake hybrid.
Litecoin
In June 2021, El Salvador became the first country to accept Bitcoin as legal tender. In September 2021, the government of China, the single largest market for Cryptocurrency, declared all Cryptocurrency transactions illegal.