Want a real life big bluff con?
This was around 1995 in Indonesia (I think, the country's name is eluding me right now).
A geologist working there basically makes up a gold mine. He goes to America, and works with a representative there for a large financing company. With his knowledge of geology, a few half truths, and a couple of completely made up facts, he gets the guy on board.
The guy drills core samples into the ground, and then uses gold from his own wedding ring to spike the samples. He knows the perfect proportions to make the sample seem very valuable, but not so valuable it would draw suspicion.
He fools everyone, the financing companies, the asayers, even the Indonesian government. His mining company (and again, he hasn't actually mined a drop of gold) goes public on the Canadian stock exchange, and it goes through the roof. Not only does he make up a gold mine, he makes up the biggest gold mine in history!!
People can't resist, the potential is too good, no one wants to get left behind on the biggest gold deals in decades. He keeps faking the samples, and people keep buying in. Eventually, his company is worth millions of dollars....and again, there is NO GOLD!!
But the story does not end happily for the guy, the Indonesian government gets greedy and they want a piece of the pie. So they forced the guy to team up with a government drilling team. Well...guess what the government found out?

The man died shortly thereafter.
This guy was not a professional con artist, he was a real life working stiff just trying to make a living... eventually gets fed up with it, and then cons the entire world.