This is the truth, when the physical market is being converted into future market, everyone can buy and sell their portfolio without being controlled by real physical market supply and demand. You just need to invest in the market with paper money and you don't even need to care whether there are stocks for gold or silver, everyone with huge amount of investment can control the market and in this case the government might be 1 of them.
Future market allows people to use margin and leverage to add more than they can chew, and you can do more with that kind of portfolio. You don't need to own bitcoin, you just need to own dollar and with leverage in future market, you can get 1:100 or even more leverage to short against everyone.
In this case people had too many uranium on too high price, the dump was logical.
I don't think people can dump uranium anytime like they sold starbucks anywhere, uranium used mainly for nuclear power and we all know how many countries that used nuclear power. Its more like US government tried to control the market with futures market where they keep printing paper money and that is why US debt increasing more and more every year.