The core activity of Nico Sàrl encompasses three main areas:
1. **Real Estate**: The company offers services in the real estate market, including the sale, purchase and rental of apartments and houses, as well as renovations and the sale of furniture.
2. **Insurance**: Nico Sàrl provides consulting services in the field of insurance, including planning for retirement and other insurance products.
3. **Financing**: The company offers consulting services in the field of financing, including the brokerage of loans and other financial products.
Overall, the core activity of the company can be described as a combination of real estate, insurance and financial services.