Promotion is necessary for all projects not only for meme coins. Now meme coins usually are used only for speculations.
Meme coins spends a lot of money for promotion. It is very important to attract attention to meme coins and promote them to create demand in the meme coins.
But once the hype is over, you may possibly be the holder of worthless tokens. This is the dilemma of holding this kind of token, you are unsure with their future, or will there be a future for this token? If you want a lil bit of insurance, you can allot some to established coins like btc. Don't go all in in meme tokens because they have a very doubtful future.