Perhaps “high interest” compounding would have been a better term.
The concept I was trying to convey was that compounding at 6% might get you $1M, but compounding over long periods at 12% doesn’t get you $2M, it gets you many, many multiples of that.
Here’s my favorite little calculator site, so you can play with the numbers and see for yourself.
I usually show the kids the difference between 6%, 8%, and 10%, which seem minor until you plug in the numbers. My “kids” are young adults, so we are using 40+ year time horizons!
This free calculator also has links explaining the compound interest formula.
www.moneychimp.com