Man, Just hold it there for now since the price was very volatile. Wait some time until the price become stable and liquidate your Bitcoin and use the fiat to buy on other exchange just like what other said. If your purpose of using Bitcoin was for money transfer then go to DEX but if your purpose was for trading then custodial exchange like robinhood was good for you.
Recommending DEX would be good but it would be better to name few good DEX that could help a lot to everyone wishes to get a DEX. There are some DEX nowadays that are just for scam or is a phishing site in which you cqn transfer your keys into their platform but sadly a user just discloses his wallet in the platform without him knowing. This is why there are some allegations here from some user from their funds being stolen.