Love the video, was thinking exactly the same about NAV. Nothing technical but just a hunch. I had 10k Verge and sold it for LTC very cheap thinking it was a dead project and it went up like crazy. Hate myself now.
I also think NAV has the best chance of being the next verge among the ones you mention.
This is sort of a gamble but either way a small bet is fine i think. Also NAV is actually much more active in development and still very cheap considering so i hold this even for long term gain i think