LuckyCoin (LKY) is a cryptocurrency originally launched in May 2013. It is notable for being the precursor to Dogecoin, as Dogecoin’s code was based on LuckyCoin. LuckyCoin introduced the concept of "lucky blocks," which offered randomly higher mining rewards. The chain was revived in 2024, continuing from the last mined block in 2013 (block 81743) to preserve the original blockchain’s integrity.

LuckyCoin is primarily a historical and community-driven project rather than a utility-focused cryptocurrency. It is recognised as one of the earliest examples of a memecoin, even before the term was popularised. It was designed to be "Fast, Fun & Fair," with randomised block rewards adding an element of chance to mining. While it lacks specific utility functions, it holds cultural significance in the crypto world as a living piece of blockchain history and a direct ancestor to Dogecoin.

LuckyCoin was created by an individual or group known as "LuckyC" in May 2013. The revival of LuckyCoin in 2024 has been driven by a community of enthusiasts who aim to preserve its historical significance. This revival maintained continuity by mining the next block (block 81744) in 2024, directly following block 81743 from 2013.