If you have lost your wallet password then it's like curtains for your coins. Try to recover with your seed, if you have that with you. Just few small things which we always ignore at the time of installing wallet can save us later from big troubles.
This is a little bit unusual, owning a huge of amount of btc and he forgot password because usually when you own big amount of btc you must have a duplicate of your keys or password. If he just keeps the seed he has a big chance of recovering his wallet. An owner of a wallet should makes other ways to remember it to recover the wallet.