Monero, Zcash, Ethereum, Dash, Bitcon Cash and many more. There are a lot of viable alts out there, some of them showing massive potential already.
All of those has a big potential in talking about profit . But most of the coin that is listed on exchanges are all has potential but it only waits a big chance or a time because some.of them sleeping and waiting for the big whales out there to wake them up. Though you need to select the right coin I.would suggest the new one it is the best to.invest to