Sounds like you are panicking. Get used to it. Most of us are. No need to keep track of those "horrible day" in the history of bitcoin. Those days will keep on coming. What was the best thing people could have done back on 13th March 2020? Invest. Those who took the opportunity of the dip, and held for almost a year, already made a lot of profit. Those who haven't sold anything, they can still make a profit selling now (but why would they?). Think of this dip as an opportunity. Take advantage of it. Invest, forget and relax.