[ejlo]

Of course, things turned out way better for him than he could have planned, but that doesn't rule out that there was some plan behind it.

Step 1. He also attacked pentagon and Washington. Imaging if the latter had succeeded! It's not hard to predict the reaction to such an event.

Step 2. I think he tried to provoke the attack on Afghanistan. Iraq was later.

Step 4. With the terrain in Afghanistan, a quick war is not possible.

[tristanj]

I'm not sure why you're clinging to this? The motivations behind the September 11 attacks have been widely discussed, see here for a summary https://en.wikipedia.org/wiki/Motives_for_the_September_11_a.... You'll see bankruptcy or causing economic damage is not mentioned anywhere. Bankruptcy came into the picture after 9/11, when then US was prepping invasion of Iraq.

If you really believe "Bin Laden destroyed the 9/11 towers to bankrupt America", do find some pre-9/11 evidence of this and update the Wiki page so others can know.