depends on how long you wanna hold your caoins and how fast you need to react to price speculation...the last altseason it was clever to have multiple sell orders in the market, especially in the bull run November/December2017. But that means you have to hold your coins on the exchange itsself....also some smaller coins in my wallets are making forks and upgrading their chain so if you are not "up to date" with each project you may get in trouble.