What is the Problem with HODLing?
There are a number of problems with HOLDing, however the primary issue is that it is massively inefficient, being that although over a long enough period of time most investments in the crypto space become profitable, throughout that period they could have been a lot more profit generated by actively trading.
You got it all wrong, and this is the part where it's the most visible! "throughout that period they could have been a lot more profit generated by actively trading." it's like you are saying "hey people try to gamble with your valuable assets, you can make more in the casino for one night than you can make by holding you valuable asset for +10 years! Well it's not like that, with trading/gambling you risk what you have, and there're chances for you to make more, but, but... you can try, like many others that have tried, and we all know that just rare are truly successful!
"however the primary issue is that it is massively inefficient" say that to people who bought bitcoin under a dollar (or ethereum, or some of many other coins) and they kept their coins safe until now!