always place memecoins for the short term. although we don't know the potential of a particular memecoin in the future. but we have to minimize the risk when we want to invest in memecoin. never put more of your money in memecoin. especially when you see something has fallen and you still hope it will come back in the future.
not all memecoins will survive in the long term, and not all will have the same fate as dogecoin.
As you said, Dogecoin is one of the coins who can survive for a long time, meaning it's also possible to invest on them for the long term. They don't just survive alone but they can also pump sometimes because of the bull run, the re-occurring meme trend, and lastly when they are being shilled/manipulated by some entity or person.
When investing, it's indeed that we need to face less risk as much as possible so aside from choosing an established meme coin and hodling them for a long time, we also need to invest only small amounts. It does not mean that we can not earn big anymore upon doing this but of course we still can, also if luck permits other than our efforts and hardworks.