This question needs a deeper understanding of a purpose. All of us going to make extra profits, so cheaper coins/tokes allow to collect more quantity.
If to speak about profits its depend on:
- % of price growth
- amount you invest
- quantity
- commision
- token/coin liquidity
- market cap
I'll give an example:
Invest 1K in BTC and 1K in ALT.
BTC could show growth for 25%mo
ALT could show growth 300%mo or more after appearing on exchanges.
So, all new coins have potential for rapid growth.
If markets become green again, altcoins will gain more value than major and big coins. We know this, bur for the question, I can say XEM for under $1 coins. Ripple is also under $1 but I would never buy that totally centralized ripple coins. XEM would be good in this case.