You're beating the average by a long shot. A traditional savings account at a big bank offers an average 0.38% APY (pocket change, in comparison). With an HYSA, your money actually works for you.

Here's how I use index funds and a simple math rule to double my net worth every decade -- without doing anything fancy.

The Rule of 72 is a simple formula to estimate how long it takes for debt to double. By dividing 72 by the interest rate, you can determine the number of years it will take for a balance to double ...