if you have a capital of around $500 and want to invest in altcoins then I would suggest SOLANA, FANTOM. at least it's a good choice even though they have recently reached their new ATH, if you browse on the SOL & FTM network, then you can find some tokens there that are still cheap and have the potential to go up, like SLIM, FRANK, TOMB, ZOO, SPIRITSWAP etc.