Their specfication
Ticker ATOM
Algo Scrypt
PoW/PoS
POW Time blocks: 60 sec.
POW Block reward: 600
Total POW coins : 6,600,000
POS: 100% Yearly Interest.
Total coins After POS End: 252,000,000
PoS: 100% Interest. ( Approx: 0.27% EveryDay )
Min.Coin age: 8 hours
Max age: unlimited
100% interest per year sound really high which will double total supply of this coin every year so if there will be no demand for it in future, you may actually loss.
Looking at
https://yobit.io/en/trade/ATOM/BTC Daily Trading volume for this one is only 0.20
BTC which is really low so don't invest much because you may struggle to sell them later on.