I agree and not only when something is not profitable, we should try to stay away from stress as much as possible because the consequences are not good at any time. There may come a time when it is not controlled, but even so we must keep them distant from that which produces it.As for me I promise myself to never stress my self much on anything that is not profitable to me in anyway, because back then while working in an organization like that,I dedicated all my time and energy to the company,but when the time to upgrade me comes they denied me. So ever since I vowed not to use my self anyhow by stressing my time for a company again.