Binance coin is of course a good coin but the question is if the coin is not overvalued. While other coins are in -90% loss, BNB multiplied its value 5 times this year.
Everyone could have different answer to that question, if you think it's overvalued, then you have to wait until the price will correct, but if not, you should buy now as it's not impossible for BNB to rise to $100 soon.
They were able to show good results which other project failed to deliver, that's why people trust the coin and with that, it was able to get the success creating a new ATH this year. It's very rare for a coin to have an increase of 5 times while the market is still in bear season for altcoins, but we can make an exception to Binance.