Trading is a losing game for the majority of people. If people all took your advice then the possible profits to made would shrink to practically nothing just like how the stock market became super efficient. The truth is holding is a valid strategy for the majority of people that don't want the constant stress of day trading
How can it possibly be a valid strategy?
And I'm not even sure what you mean by valid (or invalid) here, care to explain? A trading strategy can be profitable or unprofitable, and that's in essence all that counts and makes sense in the end. I don't know how it can be "valid" if it brings only losses, and for those who bought at anything higher than 10k, it is a losing game as of yet. So instead of daily stress these people received perpetual pain and suffering. Myself, I'd rather stick with the stress