How did WWI go from a war between two nations to a World War?

World War I developed into a global war for a number of reasons. First, the system of alliances quickly brought other nations into the war. This quickly led to a war between the two alliance systems. But Italy switched sides and entered the war on the side of the Triple Entente in 1915.

Explanation:

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.

the corporations allowed investment without risk of personal property, fueling the growth of new businesses.