Well yes and no: those staking coins do indeed get more coins but there's still lots of speculation going on. I mean: it's not a given that if, today, with x coins you can buy, say, a laptop tomorrow with x * 2 coins you'll still be able to buy that same laptop.
Stakers do definitely take the volatility risk. They're rewarded by getting more coins.
Stakers do definitely take the volatility risk. They're rewarded by getting more coins.