it is true that in a long position we must set the target that we want in multiples, even though that is not a guarantee that it will be achieved. in a long position I usually put a target of 300-500% but now I don't feel confident.
Target is always good but I have never really had one specifically, except I get out from a market when the trend is changing. I guess those who may be looking for very huge percentages may probably be long term holders, but as a trader entering a long position, there is nothing specific and if the market shows a sell signal or a buy signal, you do only what you have to do.