[truebecomefalse]

I have a wallet with ~2,400BTC and I forgot my encryption passphrase. It was >400 chars and I know most of it but I'm making some mistake somewhere in my recall. If the value keeps going up I'm going to have to get serious about cracking that wallet.

[KPLauritzen]

I would think that roughly 50k USD would be enough incentive for most people to start remembering REALLY hard

[truebecomefalse]

I meant measures beyond remembering really hard. Writing software to brute force it with the bits I already know. Believe me I'm pretty unhappy about the situation.

Provisioning EC2 GPU instances and the like and writing the grammars.

[chii]

a 400 char passphrase? dude, thats crazy.

If someone has the incentive to break into your wallet, all you need is a phrase long enough to make physical violence a better alternative for the attacker, and you're set, no need to make the phrase any longer.