polygon and matic coin have the potential to be projects with good hype and momentum and have a lot of backers and grow as the altcoin season arrives. Stellar Coin I'm not sure because this project has not been widely adopted in the market.
Maybe many altcoins will grow fast like solana, polka dot, avalanche they have higher adoption in terms of growth.
In my opinion Polygon is the most shining and promising coin, I am actively trading on Polygon DEX platforms such as Apeswap and Quickswap and the results are satisfactory, the transaction fee for sending tokens is very cheap, even less than 1 cent, I am optimistic that MATIC will skyrocket and soon reach