Who has implied "I have made money trading, therefore most people will make money trading"? I looked back through the thread and couldn't see anyone. From what I can tell there are a few categories of people here:
1. People that believe money can be made or lost by careful or not so careful trading / botting.
2. People that believe easy money can be made by mining; they don't read or participate on these forums, but they do pump money into the system.
3. People that have a vested interest in seeing the market on cex.io fluctuate wildly in order to profit from it and are thus trying to spread FUD/hype about it.
4. People that wish they had enough to invest, or made some poor choices leading to big losses and just want others to share in their misery.
I would say most people fall into category 1 but the most vocal people fall into 3.
If cex.io wanted this to be a mining operation they wouldn't have implemented a no-fee commodity trading platform. Without an external auditor of their platform I'm sure they are making plenty on the rises and falls themselves. If there's anything negative to be said about them, that's it right there. Everything else is just crying (4).
You are right that the value of a GHS will approach 0 over time, but it will never reach absolute 0 unless the value of a bitcoin and all other SHA256 coin is also 0. It is just as easy to make money in a declining market by playing the short term rises and falls. The value of a share of GHS on Cex is much different than the value of the GHS warming my basement in both positive and negative ways. It is smart to understand those differences before investing, but isn't required. The market says 0.074 right now, so that's what it is. Find someone who cares nothing for profit and is willing to sell their cex.io GHS to you at 0.03 on the belief that's all they should be worth and I'm sure we'll find people willing to buy all they are selling at that price.