If the wallet was released on the 10th we all trade for a few days... price moves up the charts quickly... The hacker comes in and says while I'm here I will steal 50 million XCR as well...
XCR being stolen was not an issue. The hacker only had the password for the NXT wallet. No other coins were ever in danger.
The hacker has compromised Bter servers directly, which forced them to change all wallets, BTC included.
As NXT was taken due to (apparently) hard-coded password to NXT wallet, same could happen to Crypti, hence the safest way to prevent it was to regenerate the genesis block completely.