Im guessing never and if gox opens withdrawls to wallets I am guessing they will do it only if bitcoin crashes to 50 or 100 usd. The good news is they will in the interim let people like plus one man trade at .50 on the dollar though for anyone that has large amounts of bitcoins stuck
Is it possible for them to allow BTC withdraws once the price crashes to 50 or 100USD? how would that work?
In exactly the same way as when the price was 0.1 USD, 1 USD, 10 USD, 100 USD or 1000 USD. The functionality of the bitcoin network does not depend on the price people choose to sell their bitcoins for.