In other news, the sky is falling. I think it's a little bit alarmist to see two sets re–released and think that it's going to kill someone's investment. LEGO can't and won't re–release a large percentage of old sets. If you're an investor, you should have a diversified "portfolio." If you only bought the Taj Mahal and the Millenium Falcon, then that's a bad investment strategy.
I do agree with @Doom2099 that he should be able to express his opinion without being investor–shamed. Everyone, including the investor–shamers, have the right to express their opinion, but why be so negative? If someone can make money off of their hobby, why not? We spend a lot of time and money on this and it's smart to find a way to take the market you fully understand and try to use it as an investment. If you're an expert in something and can make money off of it, why not?