An entrepreneur is someone who has unusual ideas for building a new business and is willing to take risks. They are motivated to start their own business due to a desire for independence, wanting to implement their own ideas, and disliking working under strict hierarchies. Some key barriers they face include a lack of funding, family support, existing market, credibility, and difficulty hiring talent. To overcome these challenges, entrepreneurs seek incubation, mentoring support from institutions, and are willing to learn from their own mistakes with help from former bosses and academics.