Tokenized group savings (DeFi integration)

Implement tokenized group savings with DeFi integration.

**Requirements:**
- Design token economics for group savings
- Integrate with DeFi protocols (yield farming, lending)
- Create smart contracts for token minting and burning
- Implement token exchange functionality
- Add liquidity pool integration
- Create dashboard for token value and yields

**Note:** This is a complex financial engineering task requiring careful auditing and testing.

**Deliverables:**
- Smart contracts for tokenized savings
- DeFi integration service
- Token economics documentation
- Testing and security audit