This sideways price action shouldn't bug you except if all your funds are all in one place.. If so, then take some of it out and look for better opportunities. It's also good to spread out your funds to minimize risk..
This may seem like a good option but things are not so easy, people try to chase profits and in their efforts to get profits they lose money, this happens all the time, you see people buying the hottest coin and they buy for a bad price, the coin goes down in value and now they need to decide if they keep holding hoping for the coin to recover its value or sell and admit they made a costly mistake.