Speculators are again burnt by using a centralized exchange for a decentralized payment system.
I know Bitstamp's security and Ibelieve it's hard to compromise cold wallets but still, a big minus on the image of Bitcoin. Bitcoin will never take off unless ALL centralized exchanges die.
Centralized exchanges can offer multi-signature for trustless Bitcoin deposits.
We should start a campaign to force them all to start using them. If they can use them, why aren't they?