1. They're not impulsive.
How many times have you made an impulse decision while at the grocery store? Or how about when you are on Amazon? It's common for most of people to make a few impulsive decisions when making purchases. Millionaires, however, have the ability to delay gratification and hold back on making impulsive decisions.
There was a famous study conducted by Dr. Walter Mischel at Stanford in the 1960s that backs up this claim. Dr. Mischel gave preschoolers the choice of eating one marshmallow whenever they wanted. The other option was to wait until the adult came back into the room. If they could stand to wait until the adult came back into the room, they would received two marshmallows. Dr. Mischel has continued to follow his subjects through the years, and he discovered that those children who could wait for the marshmallows in order to receive two marshmallows instead of only receiving one, “have a lower BMI, lower rates of addiction, a lower divorce rate and higher SAT scores.”