This is why i'm not storing my bitcoin anymore on blockchain.info
It is too risk to storing your bitcoin out there ,this is not the first the site is down, recently months the site was down due to DNS attack, there were many cases happened before.
So for security purpose you might import your wallet or maybe using another wallet. I personally will use it but only for storing little amount, i'm just too worried what if the site is offline forever.
It's not only attacks coming from external sources that cause blockchain.info to be inaccessible.
It's somewhat of a normal thing to see them display wrong information, not fix bugs that have been there for a very long time, their servers not being able to handle increased traffic, and the list goes on.
Main reason for people to keep using them is their name and the fact that they offer a very attractive user interface. Other than that, it's a shame they don't offer people a better online wallet experience.
At this point there are various options people can choose from as blockchain.info is not the only trustworthy web wallet service anymore. There are great alternatives nowadays.