I have to agree here. Market cap is a terrible way to value a coin, but we can't ignore it when trying to estimate this kind of pricing. For coins to even reach $100 is a huge feat, so I would put it past those below $100 to even try and reach $300 or $500. Ethereum, Dash and even Zencash are then the ripe candidates. Bitcoin Cash already met this valuation (and a bit unfairly I would say) so that's out of the equation. I wouldn't ignore coins like Monero either, though a more realistic push is for $300 (and that's optimistic!).
Litecoin or NEO can manage to make $1000+ in the future.
They need to be supported by the community. Once more people buy them, the price will go up very efficiently.
My expectations are high from LTC and NEO.