As we know, King Bali held a Yagna to become the King of Lords. But by taking Vamana Avatar, Lord Vishnu asked him for three steps worth of land. By his original divine avatar, Lord Vishnu covered entire earth and whole galaxy in his three steps. King Bali then became a man without any wealth. King Bali was a noble man. He was a grandchild of Vishnu's great devotee Prahalad.

So why did Lord Vishnu stop him from becoming Indra, the King of Lords?