My experiences have taught me a lot and I'm happy with my learnings.
If you talk about mistakes, of course there are bad things I did in 2019, my friend suggested to buy 1 or 2 Bitcoins at $6000/Bitcoin, i ignore it, that's my stupidity and a total mistake until now sorry, why did I not obey the advice of my friend.
Now what to say, the ship is difficult to chase deep into the ocean, can only see and reflect on the mistakes that have become the worst nightmare of all time, maybe at that time my luck was not lucky, that's the worst reality I've ever experienced in Bitcoin, if....!