What is your one memory related to Bitcoin that you want to forget? It can be anything like some sort of scam happening to you or some other type of loss.
Bitcoin doubler, during the time that I entered bitcoin market, there's a lot of scams already, but one of the earliest is the doubler, not sure if anyone has the chance to witnessed it early in their career here or if this scam is still going on till this day. But I vividly remember that during those times there are a lot of bitcoin doubler than you can find and I fell victims to it.
Of course I was very gullible and I still very green that time. And I thought that I can make easy money but investing on this doubler. In the beginning they are really paying, so you will be entice to not withdraw the money but to roll it out. But before the second payment was to be made, the site suddenly went offline and then they say it's on maintenance. However, it was a exit already and after that it's gone and so I learn it the hard way that's why till now I can't forget that experience.