Considering the economic landscape of Bangladesh, potential profitable business ideas include

1. Garment Manufacturing: Bangladesh is known for its thriving textile and garment industry. Starting a garment manufacturing unit could be lucrative.

2. Agriculture and Agro-processing: Bangladesh has a significant agricultural sector. Investing in modern farming techniques, agro-processing, or exporting agricultural products could be profitable.

3. Information Technology Services: The IT sector is growing in Bangladesh. Offering software development, IT consulting, or outsourcing services could be a viable option.

4. Tourism and Hospitality: As tourism grows, there’s potential in establishing hotels, resorts, or travel agencies to cater to the increasing number of visitors.

5. Renewable Energy: Investing in renewable energy projects, such as solar or wind power, aligns with global sustainability trends.

6. E-commerce and Online Services: With the increasing use of the internet, starting an e-commerce platform or offering online services could tap into a growing market.

Before starting any business, thorough market research and a detailed business plan are essential for success. Consider factors like target audience, competition, and potential challenges.