Here's a rewritten version with a more cautious tone:

*Limited Time Offer: Free Crypto Opportunity*

A crypto platform is offering free USDC for 15 days. Users can claim daily rewards by following the platform's guidelines.

*Details:*

- Duration: 15 days

- Reward: Free USDC

- Requirements: Follow the platform's instructions

*Considerations:*

- Terms and conditions may apply

- Potential fees or requirements for withdrawal

- Legitimacy and security of the platform

Before participating, it's essential to research the platform and understand the terms.