He sees what he and his friends are doing as potentially immoral and, by telling us, his conscience is asking us to stop him and his friends. At the same time, he's gloating about getting away with it and profiting handsomely. He believes he can't be stopped -- even if he tells us all about what they will do.
He won't stop by himself. It's in his self-interest. He enjoys the power and the technological challenge.