Hmmm...so I'm likely to get dementia?
"Likely" can be subjective and not guarantee. It may depend on your personality according to recent studies cited in Comment 223.
I do know that since I am an active investor, I spend a lot of time doing research and using my brain for my next active investment. For example, I discovered VCMDX which has done very well this year which involve derivatives in commodities. Derivative investing is NOT for passive investors. I needed a hedge against inflation and I discovered that bonds only provide a hedge during a bear market and bonds do NOT provide a hedge for inflation. If inflation do develop in one or two years, I should make money from VCMDX. Many passive investors shy away from derivatives because they do not understand derivatives.