Scam Prevention & Safety

Prediction markets expose users to ordinary online fraud risks and to some market-specific risks. The exact mix depends on whether you are using a wallet-based platform or a more traditional account model.

Protecting your capital requires understanding the specific attack vectors unique to both centralized exchanges (like Kalshi) and decentralized Web3 platforms (like Polymarket).

Web3 Phishing and Wallet Security

If you are using a decentralized platform that requires a crypto wallet (like MetaMask or Rabby), you are effectively your own bank.

• The Threat: Phishing campaigns frequently target prediction market users. Attackers will create identical replica websites or post fake links in Discord/X (Twitter) promising "free airdrops" or "bonus deposit credits."
• The Mechanism: These malicious sites prompt you to sign a transaction with your wallet. Instead of authenticating your login, the signature actually grants the attacker's smart contract permission to drain all your USDC.
• Prevention: Always bookmark the official platform URLs. Never sign a transaction if you do not explicitly understand what the contract is executing. Consider using a hardware wallet (like Ledger or Trezor) for storing large sums, keeping only your actively traded capital in your "hot" wallet.

Decentralized Oracle Manipulation (UMA)

This is an important concept for users of crypto-native markets.

Platforms like Polymarket rely on decentralized oracles (specifically, the UMA Optimistic Oracle) to determine the outcome of a market. UMA relies on economic incentives, where token holders vote on whether a market resolved "Yes" or "No" based on the established rules.

• The Threat: If a market has weak rules or unclear wording, disputes become more likely.
• The Mechanism: The biggest practical problem for most users is not some dramatic attack story. It is buying into a market whose resolution criteria are too weak or too subjective.
• Prevention: Read the Resolution Criteria carefully. If the criteria rely on vague language, a single obscure source, or unclear timing, the dispute risk is higher.

Centralized Platform Safety

For fully regulated platforms like Kalshi, the risks shift from smart contract vulnerabilities to traditional cybersecurity threats.

• 2FA Requirement: You must enable Time-Based One-Time Passwords (TOTP) using an app like Google Authenticator or Authy. Avoid SMS-based 2FA, which is highly vulnerable to SIM-swap attacks.
• Dispute Resolution: If you believe a market resolved incorrectly, use the platform's documented support and dispute process rather than assuming the public market page tells the whole story.

Practical checklist

Before you trade:

1. confirm you are on the official site
2. read the market rulebook
3. use strong account security
4. avoid oversized trades in markets you do not fully understand