For the record, the term "Insider Trading" is being misused in many posts to describe what Trump did with the tariff rug-pull. He manipulated the markets in an illegal way, just like how Elon has been sued by the SEC/FTC for making (usually) misleading/false public statements to cause changes in the price of his stocks.
Market Manipulation - deceiving investors by artificially distorting the market (like by causing mass investor panic by threatening to destroy the US economy and start a global trade war).
Insider Trading - making stock trades based on privileged/non-public information because you or someone close to you knows something privileged about a company.
So, Trump did what Elon did, but for every US-listed stock (and most globally listed stocks too). I think it might be the largest securities fraud in the history of the stock market.
Making trades based on undisclosed information about tariffs could potentially be insider trading though.