Don't waste your life waiting for a win, you will end up going crazy. Invest yeah sure, check it once a week / month on progress and just let it be man. For all we know, it could be outlawed and crash to $0 tomorrow.
Yes, it is hard to gain the price before and too long to wait to reach it again. In every increase in price, many are ready to sell what they have even get little profit because they do not wat holding but trading. Those who hold are not losing their minds, maybe what they have is not worth the price it has today. Bitcoin has high potential for recovery, it won't end no value this soon.