I would like to refine my trading strategy in regards to taking profits and need your advice so here goes:

I am not an investor, but more of a trader and don't have much allegiance to any particular coin, so if my holdings go up 20%, I will tend to sell the entire position. But all the people smarter than me take profits but don't sell 100% of their coins. So how do I really calculate or manage that?

I buy 100 Coins at $1 each. Coin goes up to $1.20 in value for 20% increase. Normally I'd sell all 100 coins.

What would you do?

Break Even Option? If I technically sold 80 of them at $1.20, the other 20 are now free as I've recouped the BTC (or ETH). Do I then keep the (now free) coins forever? I've done this "break even" strategy only a couple times but most of the time I rather just sell the whole position to have a larger stack to play with in the future.

Setup multiple sell orders at different positions? Some people not only never sell their entire stack at once... but sell only little by little so they always have some coins in case it goes to the moon and didn't miss out on that. Is that a strategy you use? Is that more of a long-term game? What if the coins value goes down that way? Gah... this is longer than I thought.

tl;dr: What is your take-profit strategy? If you don't sell your entire position, how do you calculate what you do?