Who knows how did that guy made this 500 BTC, if it was something illegal with buying real estate he have now clean money and probably making more bitcoins with his illegal activities.
But you have a point here, two years ago bitcoin was under 500 dollars and now price is much higher, bitcoin is sure better investment then real estate, then gold, and many other classic types of investments. Who ever invested in real estate instead of bitcoin now have less profit, but many people missed the chance, even people who knew about bitcoin, and to not even guess how many people still don`t know about bitcoin existence.