I target and benchmark if you want to invest, buy and sell coins, this method is commonly used by many people, if you buy a coin the price is $1/coin so you can target if the coin goes up $1.8-$2 you can release it, that's what I often do.
You don't need to wait for the purchase price of $ 1 and wait for the new $ 100 you sell, it's over time but not necessarily able to reach that much.
We must target the normal potential that can be achieved in price increases, not target high because there is no guarantee that the altcoin price can reach prices beyond speculation. I have the same strategy to take profit, even if there is pressure on the price drop then I will take profit for $1.5 because it is better to take profit than to lose.
there are many opinions and considerations from people who may not be the same or always different, some even look at luck but don't see how it decreases.
all can make their own details of targets and it is clear that each other is not the same, some are based on values and some may look from %, when setting targets up or down.
everything is clearly the same (target value or %) if it has been used often and feels that what he is doing is the right one for him, so it may not be the same or even the same. just do what is considered best then that is something that can continue to be done and does not need to be influenced by other people.