A small group has already taken over control, you have just not yet realized that.
My intuition tells me that it is not impossible that a small group tries to take over control over the entire world by using BTC (and other crypto's).
First they create "money" out of nothing.
Next step is to convince people only to use BTC. They do that by pumping BTC. The BTC are controlled and their value is defined by that small group. People will buy BTC because they are greedy and want to become rich. That is what the whales want.
If BTC would be recognized as a payment solution, several people who created BTC would become billionaires without ever having done anything but deceiving people.