..Your story makes me think you got into trading altcoins, which is very risky
Personally, I don't play with altcoins. You seem to be keen to keep playing with them, good luck....
The problem is not about trading altcoins or investing in it, but the ability to recognize opportunity and utilize that opportunity. The op already admitted that he made a lot of money perhaps from whatever he invested on (btc or alts) however he could not make the right decision as at when needed.
One important factor in crypto investment especially altcoins is knowing when to sell during the bull period, the moment you fail to recognize that period and act on it the end result is not always pleasant.
So as the @op rightly mentioned, it is very important to a have a plan, have a target goal and stick to it, otherwise it will be difficult to make the right decision during that time.
Let's face it guys, nobody seems to know what is actually happening. I thought we would see a double bottom but it seems BTC bulls are fighting hard to keep the 20k level defended. If they can do it, we may see btc rise up to be a hedge like gold, when stocks go plummeting.