Since everything is speculative, there's no accurate answer to that. Looking at the situation you have mentioned, it now depends on how you looked at it, either as a good sign to buy more or you are anticipating to crash more. Technically speaking, we can consider our decision based on how that event and situation impact the BNB market since then.
If we buy or not, maybe not because of the recent situation happening around Binance, but rather we more on believing that "it's really the right time now".
Your decision mate, it's your money at risk in the first place.
Indeed, the current conditions are not ideal conditions for BNB,
the lawsuit filed by the SEC is still ongoing and this will obviously affect the price,
but in a way this would be a good time to buy and I'm pretty sure BNB will win this case against the SEC.
While I think this is the most likely outcome, it is also important to prepare for the worst, if binance were to lose then it is likely we will see a dramatic drop on the price of their token and maybe a depeg of their stable coin could actually happen.
And if at the time you are invested in one of their coins or you have funds at this exchange you could suffer massive losses, so it seems the best possible move we can take is to keep watching the situation unfold and only invest in this coin once the result of the lawsuit is out.