Hey Hye,
I remember being in a similar position to you when I first stumbled across C2 some time ago. You have many options - and only so much time. You want to make the right investment, I can understand that.
Its obvious that you really only care about mobile development right now (I was the same when I first started as well). But I think you should broaden your scope a little bit.
Your analogy with armageddon is kind of right, it is coming.. (but what is actually coming is the opposite of armageddon lol). I can tell you that after using this program everyday for over a year - I am not angry! Infact Ashley and Tom constantly remind me that I have made the right decision with every new release.
One thing that confused me was that you presume that html5 progress is/will be slow. In reality its moving faster than most people presumed. I am extremely happy with the performance of our games in Chrome, its pretty much perfect. All we have to do now is wait for the other tech to catch up - which it will, there isnt many who dispute this either.
So if you want to start getting serious right now - what should you do in the meantime? Get on board and start building up your portfolio. It is highly unlikely that you will strike it big on your first game. Nothing you do in C2 will be a waste of time, when we hit the golden age of html5 being commonly supported, suddenly every project that you created for other platforms might be viable for mobiles now.
I could go on, but C2 is (in my opinion) the safest choice for a long term strategy if you are serious about the business side of things.