> be 2^100 times faster (possibly more if quantum computing becomes
> commonplace), and so old wallets may be easily cracked.
>
> We will need a way to force people to use newer, higher security wallets,
> and turning coins to mining rewards is better solution than them just being
> hacked.
Even in such an event, my personal view is the bitcoin owner should have the
freedom to choose upgrade to secure his/her coins or to leave the door
open for the first
hacker to assume the coins - yet the bitcoin network
that he/she trusts should not act like a hacker to assume
his/her coins.
daniel