Monero
BitBay
Expanse
Decred
Unitis
bitbay? its been around for ages and its still what it is even today. it has all the features that we all like but so are the rest of the decentralized marketplace including the projects that failed such as openbazaar. aren't they all alike just like the bitcoin marketplace like coinmall and cointoli? its never going to be useful.
Altcoins just aren't what they used to be. Years ago they were many times more worth than what they are right now. I have invested just a few bucks or some dozens of pennies just as a small secondary safe investment, but I prefer coins that let you make your own paper wallet too. One of these is TrumpCoin, I don't know much about the coin but the paper wallet design looks pretty nice and I see it's great for trading, as the price fluctuates between the same two points for days so you're able to buy for low and sell for high without spikes.
What I'm afraid of is scams. There are good projects and there are those that were made for scams, and a good example I can give is Elysium. I didn't invest a lot in it ($1.5) but it was my first Altcoin investment and I will have to be more careful next time. Projects that seem to be too good to be true really are, or at least most of them. There are rarely projects that are truly awesome, and I have all the respect for the devs of them!
The coin I'm trusting right now is Monero.