IEO will be hot, at least in 1 to 2 years. some of my friends think that BNB will replace ETH. this view may be overdone. However, i think there is still a lot of room for BNB to rise.
Hard to say that but it could be possible in the future.
If you believe that BNB can replace ETH, you need to save BNB on the separate wallet that will not interfere with your trading, and you only want to save it for a long time.
But I think it is hard for BNB to compete with Ethereum because BNB right now still trying to get the better position at the market and BNB still compete with the other coins which have the same level with BNB.
But as we don't know what will happen in the future, I think holding BNB will be a good idea, and we could buy more BNB if the price is down.