Any amount invested in our economy by him would have been invested by someone else if it hadn't been for him - unless for some reason he went out of his way, against economic gain, to lavish money on us. But if he didn't, then he was just the conduit, not the agent. But he definitely was the agent of terrorist attacks against us.
Truthfully, however, I don't know why you're even bringing that up, since it works against your argument.
What the hell are you talking about? Read my post again. I said he put a trillion dollar dent in our economy. I hope English is your first language.