I did the opposite,haha. Instead of buying, I hurriedly sold my BTC.70 when I see it falling on the $3k value. It was a tough decision to make. I am not an expert trader and I don't have that much money to buy because I already bought some on the $4k mark but like what happened , it still manage to fall below that. Those bastards are lucky for having many experiences in this trading because I'm sure they are always buying on the bottom.
You forgot to follow old rule, buy the dip! You are buying when the price is dropping, and you are selling when it`s rising. Many people do the opposite and lose money like that. With BTC you don`t cut your loses, you don`t use stop-loss option, you hold no matter what and price always bounce back. What you can do with BTC is shorting, but that will not be always an option, and you need to do have good timing for that.