Game markets are nothing like RL ones. Only basic supply/demand principle stays the same, motivation is not comparable. Mistake IRL might make you a homeless bum, mistake in game will make you shrug and grind some more cash or stuff to sell. trending products IRL make crowds crazy (see new iPhone lines), new meta items in PG will probably be noticed by 3 ppl at first. Basically, game market is always soft and safe, game economics better be planned with that in mind.