For a prediction, which one new people will buy more, we can only guess.
What is your opinion, which one will bring uns more profits? Altcoins or Bitcoin?
Newcomers in crypto are more often than not exposed to quick/fast profits in Altcoin, but majority of them forget that many of the altcoins in the network are pump and dump/shitcoins, thus it should not be which coins newcomers will buy more, but the coin that they ought to buy, and imo, Bitcoin is the better choice for a newcomer in cryptocurrencies, then as time goes on, one could buy maybe one or two other alts to add to their portfolio.
Having said that, my point exactly is that a newcomer should not immediately start looking for the coin(s) that'll bring the most profit, but should choose the most sustainable coin for the long term profits, Bitcoin is a hedge against fiat currency, it's users have freedom and control, with the influx of institutional investors, it's also heading to mainstream adoption; and in the long run will provide more profits than most altcoins that'll prolly fall short in the long term.