He's a con man and always has been. Maybe he should start selling Wall Bonds, with the rate of return that he claims for the wall he could give a great rate of return, like Bernie Madoff.
Here's a couple of descriptions of his business dealings
This one has lots of illustrations
https://www.internationalbusinessgui...siness-career/
This one has lots of verbiage
https://www.independent.co.uk/news/w...s-7173666.html