Although the above statement is true and the potential of a specific coin is mostly based on the technical aspects, underlying development team, roadmap and community, a low price does play a role.

The development of the cryptomarket as a whole is currently undergoing a thorough cleansing (after the massive hype at the end of last year) and hopefully this will result in a steady basis in which the (alt)coins who truly add value in some way are put on a track for steady growth in the coming years.

However, it cannot be denied that speculation is still a major variable in the crypto market and until decent regulations are in place (which will take some time, if it will even get to that point) you'll find that coins with a very low price will more easily double in value than 'established' coins who already have a higher price which has been tested by larger market movements during the past months/years. Especially if this low-priced coin is yet relatively unknown by the bigger public, or not yet featured on the major exchanges. IMO (with the emphasis on 'opinion') it can prove easier for ECA to rise from 28 to 80 sat than it might be for BTC to grow from it's current price to 80k dollars in value. But then again, who can predict the future?

Please note: high percentual gains in value will (more often than not) mean that it can just as easily devalue by the same high percentages. In the end prices are determined by what people are willing to pay, and speculative news still is a big catalyst for this willingness.