A lot of people are saying that this is the end of Bitstamp. That they've been goxed and that any bitcoins held on the site are now gone. This isn't true. Bitstamp WILL easily recover from this hack. It sucks that this happened, but this isn't really a huge disaster and it should by no means affect the survivability of the company.
On the 5th of January, Bitstamp lost 18,000 BTC from a 200,000 BTC reserve. That's about 9% of the total reserve.
Percentage-wise, this is very similar to the hack that Poloniex suffered in 2014. It lost 12% of its bitcoins due to a technical glitch which was exploited by a hacker. That exchange was able to recover its reserves in just mere months. It has enjoyed a spotless security record since then.
In August 2014, Bter also lost 50 million NXT worth about $1.6 million due to a hacker. After a while, they were eventually able to recover 42 million NXT making their net loss 8 million NXT and a couple hundred BTC which they sold to the hacker for bargain prices in exchange for the return of the bulk of the stolen NXT. Today, they're still operating perfectly fine.
Bitstamp has had $10 million injected into it from venture capitalist/hedge fund firm Pantera. So as a last resort, they could use this money to refund its customers. Bitstamp earns millions of dollars every year from trading fees. The majority of their coins are held in cold storage. Mike Hearn, a trusted Bitcoin dev audited their BTC reserves several months ago and confirmed that everything looked OK. The fact that only 9 percent of all funds were stolen means that the security benefits of separating hot and cold wallets is working. Services like MyBitcoin, inputs.io, and Mt. Gox that failed to properly separate the two have seen the majority of their funds disappear. From the look of this hacking incident, it is clear that Bitstamp is not making the same mistake.
TL:DR; Your deposits are safe. There is no need to worry.
your numbers maybe wrong ,according to another thread their cold wallet has roughly 130k coins
regardless of what they have in the cold wallet,
5.2 million usd of uninsured deposits is a lot to cover and the first suggestion i would have is its an inside job like gox ,mintpal and practically all the others
seems to happens every exchange when they start doing high volume .............(like retirement for life kinda money )