Hey guys, I am new so be nice

So yesterday, the co-founder of Bitcoin said that he is selling his BTCs and then maybe moving to bitcoin cash! In less than 24 hours, coinbase add this to its wallet and then price were pumped up by a few small transactions to 8500$!
In a trade world, this is illegal, isn't it?
Shouldn't Bitcoin have some sort of self regulation to prevent people from doing this kinda stuff?
for me it's mostly a strategy because everyone is anticipating Coinbase adding Bitcoin Cash and speculating the price will go up well.
But think about how many people hold Bitcoin Cash from holding so much Bitcoin. So what's up and down.