I think a bigger Shiba dump is in motion because once the expected gains from this listing isn't pure or strong there will be a massive dump, am I wrong or right.
If you follow the price change during the Robinhood listing, it looks not really significant. I don't think the whales want to take profits with the current price, they should expect a bigger price. I also think Robinhood listing isn't really big news, except it is listing on big exchanges like Binance. Because of this reason, I am not really sure that a huge drop is coming. But I agree that the price of SHIB tends to drop after a little pump on April 12-13.