So I was messaged on telegram by an imposter that he will exchange my coins, at that time I needed some skrill as I used to bet at bet365 and they don't accept crypto. So this user messaged me from where as he got to know I needed skrill and I sent him BTC since it was only $30 or something I was looking for and I cannot imagine someone scamming 30 bucks until that time. This guy simply took my money and never replied, I messaged him a few times but I had an idea that he won't return so I just did it somewhere else. I didn't block him since I had no reason for that. A few weeks later this guy comes to me and told me that he had his college fees due and was short of a few dollars and hence scammed me. You might think it was a story to cover up his scam but he actually paid me all $30 in skrill slowly and that is one of the sweetest memory I ever have in crypto.
The worst memory and experience I ever had in crypto was when I invested in some ICOs and they never even got to exchanges while they promised a lot. I don't consider selling tokens for cheap a bad memory because it can go wrong either way and it's unfortunate but not a mistake to sell them cheap.