People ask about what quantum will do to ₿ but never what it will do for chase\boa\wells fargo\hsbc
Discussion
It will have its impact, but nothing compared to Bitcoin because decentralised protocols require more time to upgrade, and signature size impacts Bitcoin a lot more.
Banks and everyone else is in the process of upgrading. Banks won't be hacked, however for Bitcoin if we don't start the work now, it may be too late.