Nothing. No value. The prices go up when they get hyped. The prices go up when they are trending. Once the hype and trend goes away, the price crashes very badly. And then once again, a new hype is created to pump the price. The bring useless updates like "burning portal" or "NFTs" or "metaverse" to bring back those hype. Most of them don't even proceed/work on the roadmap while others fail. And then look at twitter, lot's of people shilling for those meme coins.
Meme coins have no value. It is the trend, hype and community that keeps it alive.