The ONLY Legit coin besides Bitcoin is Monero and that only because it has privacy tech that was slated for Bitcoin (as can be easily researched by reading Satoshi and Hals posts) that was never implemented and if bitcoin ever implements that tech then even Monero will become worthless.
If that's your criteria, what about Litecoin?
Its originally a project that was designed to keep mining decentralized and was a great real world testbed for bitcoin technologies in the real world but lost its way when it didnt fork when script became asic.
Its worthless now in my mind except as an onboarding tool and cheaper medium of exchange between centralized exchanges.
I would never hold it.