I am still not very sure of other than staking what can be best use of owning Leo tokens

The main point of the tokens is ownership in the system. Your stake is your vote on hive.
Your stake earns interest.
It earns curations rewards and allows you to distribute reward to others based on the size of your stake.
With LEO you will be entitled to a share of the ad revenue based on your stake.

It has lots of uses and these are just the top ones.