Infer why the free enterprise system was so important to entrepreneurs and why entrepreneurs were crucial to the free enterprise system

Free enterprise is important to entrepreneurs because it creates incentives for creativity and innovation. Entrepreneurs know that their enterprise will be rewarded and thus are motivated to work to improve.  Entrepreneurs are crucial to free enterprise as they create innovations and  jobs that improve the lives of people

the answer is: must pay taxes on profits

since it is considered as a part of your income, profits from investments is eligible for tax payment.

the tax from your investment could be influenced by how long you decided to sell it. united states promotes keeping your investment for long term period. so, the tax rate for investments that you sell in less than one year is typically higher compared to investments that you sell in more than one year period.