Because he doesn't know what he's doing, and is in a rush to get more people to naively trust him with their money so that he can pat himself on the back and tell himself "i'm good enough, smart enough, and doggonit, people like me".  When he gets hacked again, which is only a matter of time, he will once again lash out at everyone who tells him he's in over his head, and tell himself it would have happened to anyone else, and his 6 months of experience gives him all the info he needs to be able to say that.

Time to get back to trying to re-invent the wheel, since the thousands of developers before him with massive amounts of experience clearly had no idea what they were doing.