Could you define "passive" please? The three most commonly used adjectives here are "positive, neutral, negative". A gold brick is "neutral", JUST as dependent on, but no less than, "neutral" property on capital gain to maintain our interest.
If you think "aggressive" is the reverse of passive (I'm not sure it is) near month futures is far more un-passive than property. Buying shares in a producing miner (whatever the commodity) taps into rising incomes during periods of rising prices. That's tempered by the fact that miners are big users of commodities themselves. No such thing as a free lunch, as we've been told.