New money or old money?
The 1% or the 0.0001%
Bill Gates or Shaq?
Your neighbor who saved $3m diligently for 30 years, or the lucky lotto winner who won $3m from a powerball.
IMO, there are so many ways to define what rich is. But, there are subtle differences. Bill Gates and Shaq could buy what ever they wanted. But, could Shaq donate $28m? He could, but it probably sting a bit financially . Gates on the other hand, it didn't even put a dent in his bank account. Gates is worth $90B vs. $400m Shaq.
BTW, just read that Gabe Newell, (Steam, AoE, former MS employee) is worth $5.5B! Holy smokes!