Safety rules
Use tokens with no cash value. Request no passwords, card data, addresses or statements. Say clearly that this is not a real product and discuss mistakes without shame or real-loss punishment. Participation is not consent to a real operation.
Four-round budget
Give 100 tokens per round: 40 for small purchases, 50 for a goal and 10 reserve. After four rounds, 160 + 200 + 40 = 400. A 30-token optional purchase in round two taken from the goal leaves 170, not 200; reducing future purchases is another choice. Discuss trade-offs, not a bad desire.
Paper portfolio
Split 1,000 units between A and B. A loses 20% and B is unchanged: 400 + 500 = 900, versus 800 if all were in A. A later rises 25% to 500, merely recovering its starting amount. Adding 100 raises the balance to 1,100 but not the two-round profit. A second 20% loss makes A 320 and the total 820. These paths are fictional and give no probabilities.
Close the activity
Check rules and sums, value correct recording and do not link self-worth to return. The game does not reproduce legal rights, fees, liquidity or readiness for real losses; it teaches distinctions among spending, saving, contributions, profit and different calculation bases.