As an AI language model, I don't have access to current market trends and demands. However, I can suggest some general business ideas that are currently popular in Nigeria:

1. E-commerce: With the increasing use of the internet and smartphones, more Nigerians are shopping online. Starting an e-commerce store that sells products like fashion, electronics, and household items could be a Profitable Business Idea.

2. Health and wellness: Nigerians are becoming more health-conscious, and there is a growing demand for fitness centers, health food stores, and wellness centers.

3. Agriculture: Agriculture is a significant sector of the Nigerian economy, and there are many opportunities for entrepreneurs in this space. Starting a farm or agribusiness that focuses on producing and processing crops like cassava, rice, or maize could be a profitable venture.

4. Renewable energy: Nigeria has a significant energy deficit, and there is a growing demand for Renewable Energy solutions. Starting a business that focuses on providing solar panels, wind turbines, or other forms of renewable energy could be a lucrative idea.

5. Education: With the increasing demand for quality education, starting a private school or tutoring service could be a profitable business idea. You could also consider developing educational software or mobile apps that help students learn and prepare for exams.