I love the concept of Bitcoin. I believe the Internet will redefine currency as we know it. I hope this helps the Bitcoin community to develop a currency that's really resilient to attacks.
But, is it possible?
Wallets and websites can be hacked, but I really doubt bitcoins itself can be hacked. Wallets and trading websites claim they're safe but in truth, anything is hackable and everything can be accessed given enough tools and time. Bitcoin Wallets are no exceptions.