> Given the limited transaction throughput, migrating all vulnerable coins would take years ...

How? I just googled: about 55 million addresses with bitcoin in them, about 144 blocks per day, about 3000 to 5000 tx per block.

In something like 100 days all the coins would be moved to other addresses.

I gotta say it'd be hilarious if to speed up that migration-to-quantum-resistant-addresses process, the Bitcoin community were to finally allow bigger blocks.

EDIT: I take it if the network had to have full blocks for 100 days, then "shit would happens". Maybe they should force an orderly move: e.g. only addresses ending with "3a" are eligible to be moved in a block whose hash ends with an "3a", etc. to prevent congestion?