When anything that has not valued for a high price yet, the circumstances is low or let me say way back years ago, Bitcoin isn't that huge price yet, it's transactions fee is only low. Also, ethereum in the other hand when it's only having low price, it's transactions fee also only low, but now both bitcoin and ethereum coin has a huge transaction fees because of their fame and value. I think it's going to happen to bnb whenever it reaches its higest peak price value.