Staking has its risks mate if that project value goes down it will affect your rewards, if you can only stake the project on a exchange anything can happen to the exchange, don't ever believe that there is no risk involved in staking coins if anyone told you otherwise you've been lied to.
Yes, because basically all jobs always have their own level of risk that can't be separated from a weakness, so there is nothing remote about risk in this world, especially for the world of cryptocurrencies with very diverse concepts.