[ergothus]

I was once asked how much money I could sustainably spend every single day without explicitly trying to waste money. I settled on 10,000/day (I assume big ticket items like house/car would be absorbed by that effortlessly).

Then I was asked to do the math on how long it would take to spend 1 billion - the minimum amount to qualify as a billionaire - at that rate.

IIRC, ignoring interest and inflation, it worked out to 216 years.

Now billionaires dont have a bill sitting around in liquid cash, this is just a thought experiment to try a grasp how much a billion is, but it is an effective one. (Also cool as a party trick, as people tend to always pick a power of ten, so based on their answer you can whip out 2161 years or 21.6 years or whatever)