My worst decision on bitcoin when i bought bitcoin on high price then a couple of hours the price went down and as a result i panic and sell it even i will lose a lot of investment. That's a newbie mistake from the past and it happens long time ago but now i learn a lot from that.
I think nobody knows when bitcoin prices will go down. So it's a natural thing when you buy and then the price goes down. As is the case today. Many people are losing because the price drops very quickly
these people if having their bitcoin tll now then they will be happy because the price of bitcoin is once again rising. At that time I was have some money to buy bitcoin but I late and was unable to buy enough and that was my worst decision to wait a little more as now the price increasing again. Still I have time I will try to buy.