Why people lose their focus whenever they are on steady path, but started wasting time in other useless things?

When we get some momentum and get appropriate results by juggling the things in hand, we internally get afraid of being out of control someday. We feel some fear inside that are we capable of doing this all for the longtime or forever? Then we dare to stop juggling and see if we can start it again or not? So this phase is having useless things, we do. It all happens because we need someone around us who can acknowledge us, appreciate us, make us feel that we are doing the best and we need to keep this momentum for at least this time or that time to get some objective completed.