We all have to make our own decisions with the information we have available and if knowing that this guy has $600,000 worth of bitcoins makes you feel comfortable, I don't think anything can dissuade you.
Personally, I think $600,000 is a ridiculously small amount of money for running a scam for over a year. I have been reading a lot about Ponzi schemes that the SCC investigates and people don't stop at a million or even 10 million. Some scans run in excess of 20 years and bring in 100 million+ before they are shut down.
I really don't think it's wise to say, "ok, let's suppose this guy is a scammer. I know how much he would be happy with." It's kind of foolish for someone to assume they can determine the limits of someone else's greed. By that logic, Bernie Madoff would have stopped at, well, a small amount like 10 billion. We all know he didn't.
I think it's safe to assume that a scam will run until it's no longer profitable. Scrypt.cc has a legion of extremely dedicated followers that dominate the debate on the various forums and give newcomers a false impression that scrypt.cc is "the best option" for cloud mining. The owner of scrypt.cc is a classic con man. He has built his entire operation through the force of his personality and by interacting directly with his investors. I believe that con men like him get a lot of pleasure out of being respected by so many. I expect Scrypt.cc to be around for a while.
The interesting thing about all this is that I gave you and everyone else the tools necessary to do your own analysis and construct a hypothetical portfolio that would justify scrypt.cc's mining performance and I was pretty much completely ignored. I guess I'm not totally surprised but I thought someone might give it a go.
One last note, I'm not anti-cloud mining and think everything is a scam. If you viewed the leaderboard over the last few months, you may have seen me under the handle "Anthony." I was number 6 before I cashed out. When dealing with tens of thousands of dollars you are forced to be a little more critical.
I usually don't mention this cuz people just say I'm full of shit (except those that actually saw it happen in the chat) but back when Admin used to say anyone can go visit the farm, I set up a visit and hired a freelancer in Brazil on a site called elance to conduct the visit. Admin never made contact with the guy, he didn't answer my tickets asking what had happened, and the next time I went in chat, it was disabled and although for a short time, I could create a new account and access the chat, now every account is disabled and I haven't been able to talk to him. So take that for what it's worth.