Comment by BatteryMountain

Of the thousands, a handful will prevail. Most of it is vaporware, just like in any boom. Every single industry has this problem; copy-cats, fakes & frauds.

"Buy my fancy oil for your coal shovel and the coal will turn into gold. If you pay for premium, you don't have to shovel yourself."

If everything goes right, there won't be a coal mine needed.