if you won 1 million dollars what would be the best way to invest it?

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like if you inherit1,000,000 what would be best way to invest that can almost garantee your principal investment and make a couple 100 thousand on the side? since 1 million doesn't have the buying power it once did. I was thinking that turning 1 million into 2 million is alot easier than turing 100 thousand into 1 million. Does anyone agree with me on this? so what is the best way to invest it? buying rental properities, leaving it in a cd account? is there any place where they give special interest rate to people who deposit alot of money?