Board Thread:General Discussion/@comment-7673575-20181008145229/@comment-31598739-20181012164022

Even though he never states anything about conquering the world, it can be HIGHLY inferred that he will just by his murderous personality. He literally massacred hamon users just so he could get the Red Stone of Aja. It's really obvious that he is power hungry, and Dio is a perfect example of what power hungry does to someone. Especially when that person has a strong ability (or in this case, never aging and never dying and having a bajillion different possible uses).