If you really want to help Bitcoin, TURN OFF your rigs and start buying.
You are almost right.
Let me add something: "If you really want to help Bitcoin, SCALE BACK your rigs and start using (or developing ways to use) bitcoin in the real world.
"Economy" based mostly on BTC price speculations will not keep bitcoin around for long. It will get boring soon and then you can kiss it goodbye for good. Real life use will lift BTC price and will keep it around for a long long time.
Maybe it's time to start looking (and marketing) BTC as a mechanism to transfer funds and not so much as a new and shiny currency. If business owners understand that idea better, then this is the way to go.
If you do not understand, wtf I am talking about, do not get angry and start screaming profanities. Look at the big picture, get over your egoistic needs and think.
We are past "how many coins can I mine", we are in the stage where "how many NEW people and businesses can adopt the idea and use *coin" has become more important than your ego stroking hashrate of your mining rig.
Question is: "Will greed and stupidity kill the BTC?" Yes, if your short term speculative gains are most important.
Are forks to blame? No way. This is normal evolution. Who knows what will survive and what will not but this is not important at t he moment. "Will *coin be adopted by businesses?" is the most important question.