Trading is never a must, like everyone should enter trading because of its promising profits. But its certainly a choice, a choice not to enter trading and stick to hodling alone, or a choice to enter trading but on a more responsible manner.
However, just like your title says, quit trading, I don't think that's applicable for everyone. There are still traders who are motivated enough to pursue their trading career because they believe that they'll be future good and profitable traders, and hodling alone they don't see theirselves gain future satisfaction.
Yeah, people need to understand that just because they are in the market, and now know about cryptocurrencies and how they bought and sold, it doesn't necessarily mean that they should become traders, one can simply stay in the market as only an investor and that's just fine, as long as you feel you are not very knowledgeable about the market and the cryptocurrencies, and you don't know how the market moves and when you should buy and when you should sell, you should simply stick to making investments and holding them for long-term instead of experimenting with your money and then eventually losing it.
There are people who are just investors, who simply buy Bitcoin when its low, and sell it when it goes high, and they don't do this in the short-term, but they buy in the bear market, and wait until the bull run so that they can get better profits. That is easier, and it doesn't need any technical knowledge or anything, basic knowledge about Bitcoin and the market is enough for you to do that because anyone can know when it's the bear market and when it's the bull run and then they should make their buys and sells according to that.