Bought again at 91000, it was up today .... heading towards 89000 k again

I've been watching the charts, and I noticed something really weird on the Revolut BTC/USD order book over the last few days.

It seems like someone is trading in a repetitive 70 BTC pattern. When they drop a big buy order (70 BTC), the price immediately spikes up. Then, just as quickly, a big sell order (70 BTC) appears and the price drops right back down.

This behavior, where large orders seem to be manipulating the price like a pump-and-dump in real-time, really looks like market manipulation

Has anyone else seen this? More importantly, has anyone tried to report this kind of specific, large-number manipulation to the exchange or a regulatory body, and did anything happen? Curious if it's even worth the effort.