In early February, Coinbase listed the Aventus token ($AVT) on its exchange and added support for Pawtocol ($UPI). Shortly before these announcements, someone created a new crypto wallet and spent more than $350,000 buying AVT. The listing news didn't result in much of a price bump for AVT, so the trader tried again — cashing out the AVT and putting it into UPI in advance of that announcement. They found success with this trade, ultimately making a profit of around $734,000. The timing of the trades, combined with the relatively unknown nature of $AVT prior to the announcement, strongly suggests someone had insider knowledge of the upcoming announcement.
- "Evidence of Insider Trading at Coinbase", FullyCrypto