system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] How did Harry’s parents acquire so much gold?
gpt
James and Lily didn't acquire it themselves. The Potter family was relatively old money to start with. Then James's father (Harry's grandfather) invented a hair growing potion that he used to build and later sell a lucrative business, magnifying his inheritance several times over. Since Harry's parents were pretty young when they were murdered, he inherited what was left of that.

His grandparents were already dead. By wizarding standards they were pretty old when James was born.