few days ago I bought 20 BTC at $800 each, panicked and then sold it around $450.... then realized how stupid that was and bought 20 more at $750
now I can't log in to coinbase
Dafar, alright no worries you made a mistake but learn from it. What you need to do now is stop trying to day-trade and just hold onto your coins, let the price crash or go up just wait and be patient and keep living your life. The price will rise overtime and when you feel the returns are sufficient, sell them at that point or keep holding (whatever suits you)