This is not true, if you do not have enough knowledge to trade the markets then the best course of action that you can take is to do nothing, you should not trade the markets in that instance, because if you lose that money you're not going to learn anything out of it because you do not have the knowledge to do that, it is better to take your time and learn how to trade without risking any money and once you're ready then you can start with a small amount of money to gain experience.
I agree but I also believe that "hodl" is a meme. Trading takes some effort to learn but it's not truly hard to get the hang off. One thing I would be worried about is the manipulation in the market, its rampant.
That is definitely the hardest thing to get used to in this market, there is no doubt that the market is being manipulated and even big coins are affected by it and this is a huge problem, and we can clearly see an example of this with what's happening at the moment with many altcoins that have being going up in value in such a fast way that it is going to be impossible for those coins to maintain that value for long and yet there are many people that are still buying them believing that this is an altcoin season when it seems obvious that it is not.