The stock exchange (Wall Street) is not a quiet savings account but a rotating market of companies with real bankruptcy risk. It is designed as a skill casino: players who read the market well profit; players who gamble blindly can lose their stake. The exchange is not a money printer — loss is a genuine part of the game.
You trade shares of companies, spread across five risk tiers. On one end sit stable blue chips with modest returns and a small chance of bankruptcy. On the other end sit risky crime startups with much higher potential returns, but also a much greater chance of going bankrupt. Pick a tier that matches your risk appetite.
A company can go bankrupt periodically. If you are still holding shares, you only get a portion of your stake back (the recovery percentage, which differs per tier) — the rest disappears from the game. Riskier tiers pay back less on bankruptcy. Diversifying and getting out in time are therefore important skills.