Staking allows to earn passive income and does not require electricity. So it safe for nature.
For those people why do not want to buy coins for staking they can participate in airdrop like this https://twitter.com/CairoFinance/status/1506234326853238791
The more popular cryptocurrency becomes the more popular is staking. Everybody want to have a passive income and a lot of new projects offer staking to attract their users.
The opportunty to earn passive income attract many people. But it is necessary to chose the project for staking that it wil be profitable and will grow in price to earn money on staking.
Not all the tokens grow in price.