That's true. The concept of staking tokens to earn rewards was originally created to reward holders (or hodlers) of project in question. Here in crypto, we have both traders and investors and while everyone can't be a trader (A full-fledged at least), staking incentivizes them to hold their favorite tokens and get rewarded for it. So it's a win-win situation for long term investors.

Aside from the incentives earned for staking it also comes with its own risks which happens when the value of the tokens drops significantly.