"How can this happen?"

This is easy to answer, because unless people stand up and stop it, these criminal activities will continue .

Sorry Stephen, but how do we stop it?

The only thing that comes to mind is for everyone to buy Bitcoin, just like buying physical gold and silver. At some point these future markets will collapse if these buyers demand the physical asset itself.

As you have said previously, they manipulate theses markets by running the FIAT printing press. When ever they are caught, they receive a small paltry fine, but have made a fortune! As far as I'm aware, they virtually never ever get convicted and go to prison. The only prominent one I know of is Bernie Madoff, but he stole from the RICH - now that is so wrong.