Some people might choose ETH due to the fact that it's very much cheaper than bitcoin and can fetch more profit than bitcoin because of it's price, but we all know bitcoin is always in the lead and determines the movement of other crypto, many people might also choose bitcoin because of risk ratio, bitcoin is less risky compared to ETH, if a crash comes in bitcoin might be affected a bit but eth would be more affected.
Well Raoul Pal had been shilling for ETH and I guess people believe it because the price is also running upwards. It's not just him because the institutions are also rooting for ETH. ETH ETF could even be approved first before BTC.
They are also shilling for the ETH use case because obviously, we can see how it's used as gas, and some disregard BTC because of it. Its blinding investors for BTC's decentralization which ETH is not.