Its not that bad actually, as even with a quantum computer you will have to "break" each address separately (within 10 minutes blocktime).. Thats why the big stash of satoshi nakamotos btc will naturally be the first target... Because there is so much money and these adresses are not hashed, making it easier to crack.. And they are spread across thousands of wallets.. As if he knew that one day maybe we need this "low hanging fruit"...this will give us extra time to migrate to new adress format..