Why
invest in gold?
Actually, "tricking" wealthy investors to put more of their investments into gold helps out everybody else. Imagine if the wealthy decided to hoard grains or oil instead - the result would be that a lot of grain and oil would be sitting around in storage, not getting used, while people around the world starved or went without energy.
If it's only a relatively useless commodity like gold sitting around in storage, what is available for people to consume isn't really affected. Thus the more we can "trick" the wealthy into selling their grains / oil and buying gold instead, the more grains and oil will be available on the market, and make life easier for everyone else.
It only becomes stupid when "tricking" the wealthy results in "tricking" everyone else as well, and they start to trade the grains / oil they've produced for the gold that's been hoarded.