Staking is like trading sometimes - if you know how to do it right, you will earn a lot here 
If you are staking all you have without any knowledge and experience - you can even lose your money.
Good knowledge and skills indeed for the crypto market everytime. That means if you want invest or trading then you should skills more for searching a good coin. Same thinking if you can got a good coin for staking then it will be profitable after long time away. Otherwise you money will be loss if you have to invest a fake inactive project. If you are staking all you have without any knowledge and experience - you can even lose your money.
That's the very risk of staking. If you failed to pick the right coin, the chance that you'll be trapped
and lose your investment is high, unlike with trading in which you can change your plan and adjust from how the
market is performing. In some cases, staking has some cooling time, you can't just withdraw your money and
chance of losing the opportunities is always possible. With trading you can just scalp or you can go for long term
and wait for the value that you desire to sell your money.