This is one of the reasons why you should not invest your funds in altcoins because they are pump-and-dump coins that can not deliver what they promise to their investors. Most altcoins are a scam after taking investors' funds they will rug-pull the coin and run away with investors' money. With Bitcoin, you will not experience all these problems, and your investment in Bitcoin will be safe, all you need is to buy Bitcoin with a DCA strategy and Bitcoin always recovers its price.
The advice you express is quite appropriate for many people to know, especially newbies who still like altcoins. Because maybe they still don't know how safe it is to invest in Bitcoin with the DCA strategy which is still widely used by investors today, so we need to provide that kind of understanding to those who still like altcoins so they can consider Bitcoin more when they want to invest, even though we not telling them to forget about altcoins. It's just that they can at least limit themselves to altcoins which frankly will not be as useful as Bitcoin which has been proven by many investors from the past until now.