Answer: Money, Resources, and Power
Step-by-step explanation:
Constantinople divides most of Europe and Asia, and served as a middle ground between the two countries. If the Ottoman Turks conquered Constantinople, it would give them the power to control all trade routes and resources coming in and out of the Bosporous Straight. As I mentioned earlier, Constantinople sits directly between Asia and Europe where the Bosporous Straight is located which would give the Ottoman Empire complete control over trade between the two countries.
Constantinople also served as a religious symbol for Muslims. The Ottoman Empire's official religion was Islam and the prophet Mohammed had stated that Constantinople would be conquered by Muslims to become a Muslim city. This further strengthened their religious influence considering that the Ottoman Empire was openly opposed to Judaism and Christianity. While they were generally tolerant, they promoted conversion and creating an officially Muslim city would cement their religious power and influence.