Tesla was use by Edison for his own benefit. When he said he could redesign the light bulb to make it efficient, Edison offered him One million dollars in modern money. Tesla agreed to this not knowing that Edison would not pay him, or give him credit. Instead he just laughed and said, "You do not understand American humor," not only that but he didn't want Tesla to As his fame grew more and more were credited for his work. Tesla had many ideas but others always stole the credit for them.
Nikola Telsa was one who did't care about money. He only cared about the well being of the people. This meant he was a humanist, and didn't care about self-benefiting. He turned down the option to become rich because it would stop people from getting energy. He put others before himself, making him one of the best people who contributed to society.
At one point Tesla lost everything, his work and lab burned down. He did not have any money and ate crackers with milk. He ended up staying a hotel where he suffered from depression and loneliness. Tesla went insane, and couldn't tell the difference between real and imaginary. He later died alone in a the motel by himself.