There's no such thing as 7% yearly interest without risk. It just doesn't exists.

If you look at government bonds (a.k.a. TBills), they'll tell you exactly how much interest a truly risk free investment is worth (in yearly interest). Anything higher then that is risky, by definition.

On top of that, you have to factor in inflation.

In other words, it's good to save money, but managing saved money is hard. Be ready for that.