After a year, a lot of lessons that we did learn. There are 2 precious things that I think I should remember:
+ Fear
+ Greed
I learned that from my teacher, he said when you buy Bitcoin at 10k, it's then $12k your greed rises inside you and you don't want to take profit and expect more. Then, the downtrend is coming, BTC goes down to $8k, you'll be scared to cut loss, and what'll happen, you lose more while BTC drops to $4k.
So, we need to set up your expected profit point as well as the stoploss point.
How about you, what is your lesson?
That's basically what happened to me last 2017. I'm at 50% profit from my altcoins and I expected that it will grow more but in the end the value slides down. But I learned my lesson. I'm always setting now a target profit for me for every investment that I'll take.