Thing is they all settle down to the good and profitable. AI isn't going to 'crash' into nothing. It'll level out into similar to those. IOT and ERP like SAP are still 'profitable' in general but nothing is the final huge endless world changing endless money machine. Crypto is pretty close to being a useless thing. The worst of all the tech fads by far has been NFTs which completely imploded to nothing and rightfully so.
When it comes down to it, most things beyond basic needs have rises and falls. AI will be very useful but it's not going to be the end of the world for most. It'll end a lot of things that need to be ended like online 'journalists'. It will likely reduce a lot of things in the tech world like CGI for movies and game dev. But there will be new markets where people aren't just 'prompt queens' but also have skills that take advantage of it to make productive things.
TL

R Luddites aren't a new thing and hate any kind of change.