Just a reminder for everyone.  Bitcoin's use of sha256, mining, is not for encrypting anything.  There is no cracking, breaking, or decrypting anything the miners do to win a block.  

Stop listening to idiots tell you a.i. could break this because that is not how Bitcoin uses sha256.

The concern would be using sha256 to hash your password, or any sensitive data used as an input.  But that has nothing to do with Bitcoin mining.

https://www.reddit.com/r/Bitcoin/comments/18dowmw/ai_could_break_bitcoinsha256/