I think NO, you shouldnt. Because These sites can be categorized mostly as scams or HYIPs (high yield investment programs).
These sites take money from people around and promise to give them interest on them. They will then start off by paying these returns through money they get from new sign ups and create a big buzz around the site. Usually they will also have some sort of referral program so that users can bring in their friends. This will go on for around 3-4 months until one day the website will just go offline and the money will be gone.
I should you stay away from sites promise double your coins or give you daily interest on them.