1)US$, due to mimimun $5000, you can buy CIBC mutual funds, and there is actually no risk. The interest is a little less than saving. It is flexiable, you need 3 days or less to change the bonds to money. There are service charge, you'd better not change frequently. You can buy other mutual funds, some have big risk but may reap big profit as well. We call it gambling.
2)CAN$, saving or GIC. GIC's rate is a little less than saving, but you can withdraw some of your investment after 1 month. The rate is subject to change and you can have longer-term agreement (the rate is fixed on the agreement). I don't know if there are minimun for CAN$ saving, it could be, but not that high amount restrait as US.