I think there is no need to doubt that when talking about BNB it is very good for long-term investment,
but the question is when the price will be lower again,
maybe need to be patient waiting for that and keep following the progress
The price of BNB will be lower if BTC drops again in the market because that is the basic influence for the price of BNB that I have seen so far, so just wait for BTC to decline again and you will see the price of BNB be lower than it is now, even after that everyone will also expect a price increase on all coins including on BNB. So if you can be very confident in BNB, then it's also a good idea to buy it now without having to wait for another price drop at BNB.
In most cases, that might be a working strategy if you are into scalping this coin.
Wait for Bitcoin to influence the market and place your entry, then wait for a good bounce to collect a decent amount
of profits from your initial.
Though there's also time that BNB is not moving alongside with BTC but it's just in rare cases or if there's good
news that the team is doing to bring investors' interest.