You may have a point but I do not agree when you say that HODL is not advisable. HODL is proven effective by so many experienced crypto fanatics, even expert traders. So I guess HODL is advisable to a certain extent. To demonstrate it to you the importance of HODL, you may just take a look at the previous year. Take a look at Bitcoin, Ethereum, LiteCoin, and other solid coins.
If you are not very confident with day trading, just HODL.
I agree with this statement, in trading you can loose a lot of money very quickly. If you hodl you only have paper losses, unless you get to the stage of panic and selling low because of the (often irrational) fear to loose everything.