Donald Trump fancies himself Caesar, but the Roman figure he most closely resembles is not Caesar, but Crassus.
Marcus Licinius Crassus lived from 115 to 53BC. He was a Roman nobleman who made his money in real-estate. He accumulated vast real-estate holdings through one simple trick: he owned Rome's only fire department. When buildings were on fire, he would send his firefighters there but not put out the fire. Instead, he would offer to buy the burning building from its owner at an absurdly low price. If the owner refused, he would let the building burn down. If the owner agreed, he would put out the fire and add the building to his real-estate holdings.
He was such a corrupt, vile, selfish individual that the modern insult "crass" is named after him. When he was captured in Parthia after a disastrous attempt to play at being a general, it is said that his captors killed him by pouring molten gold down his throat, to mock his legendary greed.