Part of LinkedIn database was leaked and millions of (encrypted) passwords are now in the hands of hackers with potential malicious use. Even though encryption is strong this doesn’t mean your password is safe. They can find your password with a brute force attack and they will do it because they are not cracking one password which might not be worth the time but they can crack millions of passwords simultaneously. It is a matter of time until they crack the passwords and the best protection now is to change your password so even if they find which was the password it will now be different and don’t be able to access your account. If you don’t change the password and your account is hijacked then don’t complain about it because is your fault.