lots of people are buying these 30k jpgs, because they have worked their way up in the opensea market to be able to afford 10 eth or whatever it is. hardly anyone is actually dumping their hard earned savings into eth to buy a 30k jpg, other than celebrities like steph curry who just bought a bored ape for 55 eth, or 180k usd. check out the volume on opensea and you can see how fast the market has grown, and in my opinion it's still growing, but i can't say for how long.
https://ca.movies.yahoo.com/opensea-...133114338.html
i agree that most nfts are worthless and will become worthless again someday, but some actually have utility. some of them are for example, part of play to earn games. there is a game called axie infinity that you can earn somewhere around $2k per month playing 8 hours a day. the problem is you need a good team, and that consists of buying 3 'axies' that are nfts. a good team costs around $3-4k right now that will make earning the in game crypto more effective.
sure 2k doesnt sound like a ton of money but a lot of the players are from developing countries. they have a program called 'scholarships' where owners of axie teams can 'hire' scholars from the phillipines to play their teams for them and they get something like a 50/50 split on the currency earned. you should see how many scholars apply to these positions.. if you are accepting applications to hire scholars, you'll get at least 20 in the first few hours. i've seen some guys have over 100 teams of scholars that they manage. so even after the split, thats like making 100k per month... of course these are guys who either bought axies when they were cheap, or have traded their way up to having lots of eth in their wallets... either way it's pretty interesting stuff and it proves that there is some real utility in play to earn with nfts.