For me, that had to be Ripple. I traded for 100%+ thrice and still holding a position at $0.40.
My next coins are:
1) Ripple
2) ADA
3) Bitcoin
4) Ethereum
What's yours?
I had told little of these coins so the money I make from them are tkl low, instead I made good amount of money from YOUC and DIA, that DIA net me over 800$ and thats because I hold till price gets to 3$ again and YOUC was amazing, I made 1000$ gain from the project already