I don't need to warn you that this isn't a financial advice, 20-40$ won't take your life away anyways, I'm just saying it's possible that Elon musk will push Shiba inu too if the chance comes
Look, this sounds like great advice on its own. But it's flawed in at least 2 angles I can think of.
The first, is the amount that you suggest is worth nothing. $40 won't take your life away sure but in some parts of the world it's more than 1 week of salary working every day. In MY part of the world. Back where I come from, that's 2 months working every day no weekends. So it's not the amount, but how much of your income you are willing to put in.
The second, is the assumption that this is the only coin you'll ever throw $40 into. Once you get into the habit of gambling you think, well, $400 for 10 random memecoins, surely 1 of them must moon x100 right? False. It's just gambling. Pretty soon, you drop 10 coins $400, you'll drop double that the next month.
When you could have used $40 a whole year and get $480 of BTC via DCA.