1. Cultural barriers
Not everybody has the ability to take a risk - many people value the security of a good job or regular income.
Why do you think this is?
Entrepreneurship can lead to failure.
Does society view failure as a mistake?
Do you think this acts as a barrier to enterprise?
2. Lack of knowledge or experience.
What skills do you need to become a successful entrepreneur?
Where and how would you learn them?
3. Rules, tax and legislation.
For example - running a business from home. Details here.
4. Financial barriers.
If you do not have the necessary finance - what can you do?