Convince opponent to hand over possession of money. Person who has more money at the end period wins. Money is to be handed over to collector at the end period to be verified.
Initial Setup:
Disadvantage - Opponent has obtained all of your money.
Strategy:
Make opponent aware of your presence. Stake out and survey place where opponent has hid money in his house securely, but do not take any further action. Act calmly and confidently. This causes paranoia in opponent, increasing the psychological burden of hiding and securing the money on him.
Misdirect opponent about the collection time, taking advantage of psychological stress. When "time" is up, impersonate the collector. The psychological influences will cause opponent to willingly hand over the money to you.