10/05/2026
Growing up, you were probably taught a simple rule:
The more money in your bank account, the better.
That's not wrong.
Having money is better than not having it.
But that rule leaves something out: opportunity cost.
Opportunity cost is what you give up by choosing one option over another.
Every dollar sitting in a checking account isn't just "safe."
It's also not doing anything else.
Here's a simple example:
Say you have $50,000 sitting in a checking account earning close to nothing, call it 0.5%.
After 10 years, that grows to about $52,500.
Now say that same $50,000 was invested instead, averaging 8% a year.
After 10 years, that grows to about $108,000.
Same starting amount.
Same 10 years.
A difference of roughly $55,000.
That's the opportunity cost of "playing it safe" with money you didn't actually need to keep liquid.
To be clear, this isn't an argument against having cash.
You need an emergency fund.
You need money set aside for near-term expenses.
Cash has a job, and it's a real one.
But beyond what you actually need on hand, letting excess cash sit there isn't neutral.
It has a cost.
It's just a quiet one, because you never see the number for what it didn't become.
The real question isn't "How much money do I have?"
It's "Is my money doing the job I actually need it to do?"
Hypothetical example for illustration only. Not a projection or guarantee of future results.
Cheers!
-Ryan