For the bet: I'm not a betting guy anymore.
For DRK vs MRO, have you actually tried using MRO?
Please go right now, download the client and try using it. See what it is, how it works etc. Come back and report your findings.
Even ignoring all its flaws, Darkcoin will not see widespread adoption simply based on the fact that its "darkness" was not designed to appeal to the masses.
That's the thing.
Even if it's outside 90% of the mainstream, with just 10% of transaction going private/anonymous, it will still appeal to a 700mn marketcap.