why the coin price is down 
coin price is increasing means recovering already. ups and downs are common in todays trading market. Staking pool is good has in case of solo u need to keep it wallet always on and u need to supply 24/7internet and current supply and for staking u must have a high end system which is little risky so it's better to choose pool staking
its better u choose pool staking bcoz in case of pool staking the coins stakes faster than compare to the solo staking
its little risky if u choose the solo staking