When did the Ottoman Empire reach its peak?
The ottoman empire's peak was from 1481-1566, during the reign of Suleiman the Magnificent.
Trade was critical in the Ottoman Empire because the goal of the empire itself was expansionism. In order to reach this goal, the Ottoman government sought to attract resources for revenue. In order to do this, the government became tolerant of a broad spectrum of diversity in its inhabitants; thus paving the way for more people (and resources) to flourish within the empire. This tactic precipitated the growth and extension of the Ottoman Empire's power.
Byzantium's main influence was in Anatolia, what is modern day Turkey. Even at it's peak the Byzantine Empire wan't very large, but its borders were constantly being compromised by nomadic Turkic horsemen, but even more so by the Ottoman Empire. Eventually, all that all that remained of the Byzantine Empire was the city of Constantinople, which was eventually sacked by the Ottoman Empire in 1453 under Sultan Mehmed II.