BNB and ETH is great coins now and really trusted. if i have to choose, i will choose both, because i'm holder both of them, and because they is promising coins in future (IMO) especially BNB.
It seems that BNB is a popular choice for the time being and I also hold this coin because the profit earned from this coin is huge. I bought from 2018 and until now my profit has increased by more than 500% so this is the option that you should not ignore. In addition, if you want to join IEO at Binance, you can use BNB because this is a mandatory requirement of this exchange.