Hypnotized? I think not. I don't believe fully in the concept and for it to work, it needs the right environment and mood, which you cannot have with a total stranger or an unwilling person.
Risks which are related to this include;
• Getting an overdose of drugs which can make one delirious and prone to divulge personal information when persuaded,
• Getting kidnapped and threatened to reveal the details of your wallet or to send them to a different wallet. Here, plausible deniability would help a lot.