I Have No Motivation To Do Anything Worthwhile,it All Seems

I have no motivation to do anything worthwhile,it all seems a waste of time and to what point? I am physically tired always however my mind never stops and I rarely sleep. I sometimes go three to four days with only @five hours of sleep. I am getting older now and I am finding fewer reasons to keep trying. Does any of this ring a bell? Russell...41 yr old white male.