Bitcoin is more vulnerable to quantum cryptography than traditional institutions like banks, says @apruden08 "One reason is obvious. Satoshi — who we think has gone away or died or something — their early bitcoin hasn't moved. There's a bunch of lost coins. All in all, about 15% of bitcoin supply is estimated to be lost. That's hundreds of billions of dollars. That's a huge incentive." "Let's take the counterexample of if someone wanted to hack into a bank or something. As you pointed out,…