I think it will be a big rival of ETH and might soon replace ETH in the rank 2 spot.
As long as binance create more oppertunity for BNB hodlers, it'll continue the bullish rally and it can be the best rival of ETH. Also, sooner or later BNB will get into rank two if it's continued the bullish rally and eth get more correction with small bounce back.
What do you think are the reasons for this pump?
BNB increased a lot whenever it's going to do an IEO for new projects as participants need to stake bnb in order to get allocation. Also, yield farming is introduced by binance through launchpool where most of the allocation goes for the BNB staking. So, BNB started its bullish rally when TKO IEO was started and there will be a quarterly burn event in the upcoming months which help BNB to maintain the bullish rally to target for $750 or even $1000, IMO.