First off, GPUs haven't been used for mining Bitcoin for about a decade. There has been a lot of work being done to crack brainwallets, also there are a number

First off, GPUs haven't been used for mining Bitcoin for about a decade. There has been a lot of work being done to crack brainwallets, also there are a number of leaked/hacked/shared wallets that people are working on cracking. There have also been a number of wallets generated with weak RNGs which get cracked, vulgarity wallets etc, and of course, the LastPass vaults as described in the article.