Is it possible to crack an encrypted BTC wallet if you lose the password?
If it is, how difficult would it be?
Unless the password was very short or you know more or less what it was it would take a LONG time to go through every possible character combination to find the correct password.
The shorter the password was the easier it would be to crack it. For example a 4 character password would be pretty quick to crack. A 30 character password would be just about impossible in an acceptable amount of time with current hardware.
Or unless you do an exploit
ex: saving 'image' of all bits on memories of all components of the materials that you have using to access to your wallet, and try to extract from it your "pasword"