I'm betting on
Blocknet as my "dark horse" among all the alt's for a number of reasons.
1) First DEX to launch on the market back in 2018, not the most known one though, but they've worked A LOT on it, and is soon ready with their Lite wallet which can be used to swap your assets with. Read more here: Xlitewallet.com
Their XRouter is promising since it's basically built the same way Chainlinks Oracle networks is, just WAY more decentralized, meaning: NO KYC, which is pretty promising.
I believe once they start partnering up with other projects, that this one will gather MASSIVE attention.
This one is a gamble, but could pull off more than a 100x conservatively.

Blocknet could be one that everyone is talking about, not because it is amazing right now and it is not really looking like it is going to "fly" but for the fact that everyone is using uniswap like crazy however even uniswap with all the freedom and decentralization it has consists of one tiny problem that limits people which is the fact that it is ERC20 wallet connected, so you can't deal with other chains if you use uniswap.
I am not saying that will make uniswap bad, it will still be awesome and that is why I see a future with it, however this also gives blocknet a market to work for, which we don't know if they will manage to capture or not but at least with blocknet you have something like uniswap but on any exchange you want. That seems like a potentially profitable project, if they could actually achieve what they want.