You can't explain something that changes over time with something that's always true. Does their greed steadily increase? When prices go down is that because th

You can't explain something that changes over time with something that's always true. Does their greed steadily increase? When prices go down is that because they became less greedy? Doesn't look true anyway. https://ycharts.com/companies/MCD/profit_margin https://ycharts.com/companies/MCD/profit_margin