There is a policy, although it seems simple and trivial, but it is still possible to implement it.
Whales or famous people or large companies that play with the market to increase their money.
Whales create a positive feeling in the market with significant step purchases, ordinary people receive this signal and buy more (more profit in price) and then, boom, heavier sales from the whales begin (people also enter the fear phase and start selling) and after a short period, they continue the same thing again.
Famous people and companies also cause a stir by publishing news about their purchases and after a significant increase, they start selling secretly (yes, it is not completely secret but they no longer shout about this sale like when they bought, although they know how to do it secretly) and again ordinary people get scared.
I agree that people should be well informed about the financial markets they operate in, but unfortunately not everyone is.
I think the winners are the holders, or at least those who hold relatively long-term.