I guess the theoretical limit to how much money you could make in the market is "the sum of all volatility", but I wonder how realistically possible it would be to even dream of beating 62% yearly.
The returns of modern HFT market makers are even higher. With their unfair “business” advantages such as PFOF, privileged dark pool and block trade access, and military internet infrastructure.
Think 60%+, per year, at least. Over 10-20 years, of course.
The returns of a child's lemonade stand are even higher...
Market makers and lemonade stands are mostly about paying for labour (and ideas etc, but let's call that 'labour', too). Capital requirements are rather low. So taking all the profit and attributing it to capital returns tends to give you weird numbers.
Why does it matter? Returns are returns. Money in, money out.
After all, people compare HYSA bank interest with TreasuryDirect bond returns with equity ETFs like VTI and QQQ. Each with vastly different capital mechanics.
They wouldn't hire me either!
