No one is a trustable one hundred percent, not the Matic squad, not the CZ. CZ said MATIC didn't exploit this, but who knows? Crypto world has the previous record that the project team deceives investors in smart ways several times, this year we've seen Populous team do it, so I think this big dump came from the MATIC team or whales, but the price will soon recover, Binance team will cover it.