In labh coin has longer you hold coins in your wallet ,the higher reward you get and it is good to make profit.
Not in wallet, you should add your coins to staking pool from your wallet and in staking pool only you can get more reward coins, it is the best way to increase your coins in your waallet.
ya by holding coins in wallet is of no use , its better to transfer coins from wallet to the pool so that you will get more reward and your coins get increased