The open blockchain platform Harmony has announced that it will start supporting staking from now, in an effort to create a blockchain-based infrastructure.
source: https://www.harmony.one/
Of course, as I know, there are many exchanges that support staking.
I want to fully understand what is staking and what are the best coins and platforms that we can do staking and give good profits?

My most important question: Which is better, staking or investing?