According to the source, a Singapore entrepreneur lost his entire crypto portfolio after installing a fake game that delivered wallet‑draining malware, underscoring elevated operational risk in self‑custody, source: the provided source. For active traders, irreversible on-chain transfers mean losses from compromised wallets cannot be clawed back, making custody hygiene a core part of risk management, source: Ethereum Foundation documentation. Mitigation steps include holding long-term funds on hardware wallets, using small-balance hot wallets for dApps, verifying apps only from official stores, and avoiding sideloaded or unknown installers, source: Ledger Academy security guidelines and Singapore Police Force malware advisories. If compromise is suspected, immediately migrate assets to a new seed on a clean device, revoke token approvals, rotate passwords and 2FA, and conduct malware scans before re-entering markets, source: MetaMask security support and Singapore Police Force advisories.