Yes, a competent investor has an investment strategy and follows it. Most users on this forum do not have a strategy, this can be understood from their posts. To buy only because the price has fallen is the strategy of the majority. And this was repeated for about a year.
The price of ethereum fell almost 10 times but I think that this is a good investment. And this cryptocurrency needed to be bought at a price of $ 100. Time will tell which of us is right
Each has its own strategy, without it, actions will be chaotic and each will have its own, not one for everyone, but the general rule comes down to understanding what we are buying.