Would it surprise anyone if the next coup were to come from a maverick feudal lord?
Caesar may have consolidated purple, but he ultimately only cracked the floodgates open to end the Republican era of Rome. Those that followed his path were the true first citizens of power. A citizen of humanity's first continent for first citizen, indeed.
It destroyed a democracy and lead to terrible civil war and eventually feudalism where most of the population were serfs – aka slaves in all but name. He was a products of his time, but played a large role in a terrible fulcrum in western history.