Welcome to steemit. Buying high sell low is a typical problem during price drops. I made this mistake myself twice. Now I don't try to sell because I might be able to buy in lower again. Just hold if I believe in higher value of the coins. Or set a limit for myself when to leave the bearish market.
But now you're invested again, right?
RE: How I Lost 2000$ Worth Of Altcoins In The Month Of January 2018 - My Short Story