Perhaps, it only gives us stress, especially upon checking the price dump and sometimes this is the reason why we could think negatively and even sell our coins. If we are investing, whether it is short-term or long-term, we can never expect a profit right away like buying today and making a profit by tomorrow. The idea of checking every day is not a good practice for real investors as they will just check when they hear good news and just hold when they hear negative news. I think checking once a month is good enough, in fact, we can also check the market chart so we are still aware of whether we are in a profit already or not.