As matthewh3 said, we need to go dark. Because no matter what, some people will always take bitcoins (unless the fatal flaw in system is discovered) for exchange of something. IF the services and infrastructure is created and secured before SHTF, we have a huge advantage. If not, USD price of BTC will fall near zero for sure, but will recover after some time on black market.
you can pay 1000 hackers for one year to make the bitcoin experience as painful as possible
Yeah... and not a single one of them is going to leak anything.