It is very difficult to predict the future potential of the coin because a lot of new coins appear every day.
But it is necessary to check everything and carefully study the product that projects offers.
The best way to get free tokens is to participate in its airdrop like this
https://twitter.com/CairoFinance/status/1506234326853238791Airdrops offers many opportunities for users. But it is necessary to participate in different airdrips to earn more.
The more people participate in airdrops the more popular become the project.
Only time can show which altcoins have such big potential like Ethereum.
Every day a lot of new projects appear but not all of them are useful and bring an new technology.