When I saw the prices of crypto currencies there is almost every coin's price fell upto 20%.Do you think this is just happening due to South Korea's ban over crypto currencies or there is other reasons for that.
I hope the condition will be back normal soon but I am worried a lot.

Dont worry mate, it will be back soon because it is just temporary issue from big player to make the price down.
The price will be normal as soon as all crypto hunter realize that the issue is not right. Just hold the bitcoin and altcoin and we will be the winner soon.