1. Try using something like
btcrecover or JohnTheRipper or HashCat to bruteforce the password
2. Try using a professional service (like
WalletRecoveryServices as mentioned by DarkStar_) to bruteforce the password for you
3. Accept defeat and wave good bye to 1 BTC
I'd say 3. is not an option
Before accepting such a defeat, 1. and 2. should definitely be tried. I'd personally never delete such a wallet.. it may be crackable in 10 years due to better hardware and eventually a flaw in the wallet :>
OP, if you do have a 'list' of old passwords or if you do have a certain kind of 'pattern' which you frequently use, the recoveryservice might be very promising.
It seems this service is very successfull in restoring wallet passwords from user who don't remember the password, but provide a list of possible combination.
Do you remember how long your password was? Or at least how long it could be at the most?
This heavily determines how 'easy' it is to bruteforce such a password.