The profit taking between traders and investors is different, but in principle it must have the price target. Before we buy/sell in the market, we must have a careful plan so that we can stay in the market for a long time.
Thats true, having a plan to follow is better, it will serve as your guide to not commit or turn to a wrong path. But first, take time to learn and be familiar with crypto because most of them are existing without utility, just pure hype and risky to invest in. The right timing to take profit depends on each of us, because sometimes we have high expectation to a particular coin or we have set a target price. For me if the price is in bullish then its time to take profit then buy back once there's a correction. But I also have few coins that I prefer to hold for long period, they're an established coins.