Use altcoins to buy and sell goods? Who needs it?
Anyone who doesn't want to pay BTC's high fees or wait 10 minutes to 2 hours (or even longer) for a tx to confirm.
If it worked that way, we would have seen long ago that altcoins outperform bitcoin in many ways in the amount of value transferred on the blockchain, but for some reason that is not the case. It's the same as hoping that someone will use a little-known blockchain instead of ETH because it's faster and cheaper.
Altcoins are only used for speculation and nothing else, that is their main purpose.
The majority of altcoins (out of the thousands every created) don't serve a purpose outside of speculation but to make an absolute statement like yours is ignorant at best.
Ignorant? Just because nutildah holds a different opinion?
Meme coins have made that goal an absolute. I'm not sure that someone would want to buy meme-coins as a means of payment. The goal there is different, to get the maximum profit in a short period of time. For such tasks investing in meme coins suits best.
Dogecoin isn't just a "meme coin", its the first memecoin with the biggest community. It just happens to have what turned out to be a winning combination of short block times and a consistently inflationary supply. Both of those things help it act better as a currency than Bitcoin.
Many altcoins make that claim, but all of them are far from the level of usage that bitcoin has. Apparently, the speed of transactions and their cheapness are not enough to dislodge the main cryptocurrency from the pedestal.