A 23-year-old crypto scammer was arrested at Singapore's Woodlands Checkpoint after allegedly swindling a woman out of $1 million in a fraudulent investment scheme. As a blockchain analyst, I break down the red flags missed in this case, why banks are becoming scam watchdogs, and how to spot Ponzi schemes masquerading as 'DeFi opportunities.' Spoiler: If someone asks you to withdraw cash for crypto, run.