A lost Bitcoin wallet with around 30-40 bitcoin in it.

Recently I was talking to a relative of mine and they told me that years ago they bought a few hundred dollars worth of bitcoin back when it was extremely cheap. At the time they thought it was just another scam, forgot about the wallet and lost access to the email associated with it. They say that they still know what the email is just not the password and if its even still accessible due to years of inacitvity. Any advice or will the bitcoin sit in that wallet till the end of times?