Monopoly Madness (UP)

To steal a property you need to get the power-up with a bullseye target icon, this will put a "strike" on the property, and if the opponent doesn't do anything, you'll steal the property once the timer runs out.
This also work with the auction hammer power-up, this will put the opponent's property back in auction, and if you win it you will get the trophy.
Or you can also use the spaceship power-up, or even the balloon power-up.