I prefer bitcoin because it is faster and more profitable. the current bitcoin price is much higher. I suggest that you look for opportunities to get bitcoins at low prices if you want a bigger profit.
yes indeed that's true but in my view better choose both rather than pick only one of them but if you have to choice between them then bitcoin is more potential rather than ETH as you can see bitcoin has already reach all time high and still possible for next several month bitcoin price will surpassing the current all time high so invest bitcoin indeed profitable
you are correct, better to invest on both or better to broaden your range of investment with other altcoins. For me, il put the highest percentage of investments in bitcoin due to its sheer popularity then distribute the remaining in other altcoins