All top Altcoins are popular and affordable and worth investing in. It depends on you which one you choose to make, but in any case, these coins will bring you profit, the main thing is to do it all right
It is true that it all depends on ourselves in processing it because all coins are almost balanced with the system and transaction costs as potential in the market such as the example of Bitcoin has high potential but is expensive. One day we will understand if we are not the only one who wants profit, but many other people also need it (developer / team), as much as possible it will not harm us all.