Want to know if Dom Perignon is worth keeping

[Julsway]

Hi, Hope someone can help me. I have aquired a bottle of Moet & Chandon Cuvee Dom Perignon 1966. It is still in the box and has been kept hidden in a dark cabinet for many years. Is it worth anything or would it be worth keeping. I don't know much about it so I don't know if 66 was a good year.

Thanks for the help.