If Total Assets * Expected Annual Return > Expected Savings this means your investments are earning you more than you are saving, so you should focus on your investments. However, if you can feasible save more than your assets can earn you in a year, focus on saving.Practically speaking, if you have $100,000 in assets with an expected return of 5% each year, this means you would expect your investments to earn $5,000 annually (or $100,000 * 0.05). Additionally, if you expect to save $7,500 a year, which is greater than the expected $5,000 from investments, you should focus on saving more money.
Source: Saving is For the Poor, Investing is For the Rich – Of Dollars And Data