Different investments suit different people at different stages in their lives & each one have its own level of risk & reward.
The Basic rule of thumb?
The greater the risk, the greater the potential reward & vice-versa.
Here is a broad description of some investment options:
Gold & Real Estate are traditional investments & due to their physical nature are not liquid.
PF, PPF, NSC & Post office savings are long term national savings avenues that help to you same for retirement besides offering tax benefits.
When it comes to true blue financial investments, there are three main assets classes: