As I have previously stated I am working on a new coin coded from the ground up using a highly object orientated approach with cross-platform C++11 code and no large libraries like boost, but that will be at least a few months before I even have the foundations complete, and even after it's finished it will still be considered highly experimental. A coin like Cryptonite which at least has several years of history is going to be more trustworthy than a completely new coin, now that this bug has been patched I'd say Cryptonite is quite secure. I'm sure many people are going to be trying the exploit to see if they can get around our fixes, which will help us find any other holes in the protocol. Also I don't really think the attacker managed to shift the market a whole lot so it's not the end of the world, and we don't know how much of the funds were locked by exchanges, I'm sure the attacker would have triggered some alarm bells before being able to sell off all their coins.