you will probably be in the same or a lower tax bracket when you retire

your investment income grows tax-free inside the RRSP

you can invest in stocks, bonds, foreign and other investments without worrying about the tax implications

you are less likely to withdraw the money than if you are saving it in an unregistered account, so you will build up a sizeable nest egg by retirement

you will be in a higher tax bracket after retirement, and

you invest all your money in investments which produce capital gains or eligible Canadian dividends, and

you are comfortable not owning any bonds or other interest-producing investments, and

you do not sell any investments until retirement, because the sale would generate taxable capital gains.

Recommended stocks/ETFs for inside or outside of your RRSP

What is better - TFSA or RRSP?