You're diversifying for sure.

However, I'm not sure whether or not it's necessarily a good idea to invest in two coins that are completely opposites of each other. That could potentially mean that any gains in one of the coins can be offset by losses in another coin in your portfolio. I'd rather pick a sector which I think has potential and diversify within that sector.

Also, you're not completely eliminating the risk that one of the projects will go rogue. This indiosyncratic risk will always be there.