BNB has always been in an overall uptrend, the coin naturally pumps when BINANCE gets more and more people onboard. When altseason happens, the affluence on exchanges skyrocket and so will BNB's price
We have been in a small downtrend and stopped for accumulation, the token making higher lows with volume which is a very good sign.
It is always a good idea to add an exchange coin to your portfolio as it is a secure edge, reliable and with a real use case. Binance being the leader in the altmarkets, it has also added new margin trading possibilities on alts.