I've got long term BTC that I never touch (no matter what).

But I've just sold all my current BTC and will sit this one on the sidelines for the next few days until this blows over.  If I have to buy back at 5-15% loss in a few days...so be it...but I have no appetite to take massive haircut if this turns into panic.

(P.S. Sitting on the sidelines at bitstamp. No way I'd keep fiat or btc in Mt Gox right now)