If AI replaces nearly all jobs and we’re all living off UBI, how is anyone supposed to improve their financial situation?

Something I’ve been thinking about with all the talk about AI replacing jobs and eventually creating some kind of post-work society. Let’s say AI and robotics eventually automate 90-99% of jobs. Most people are no longer employed, the government provides everyone with UBI, and the massive efficiency gains make everyday goods and services incredibly cheap. Sounds great on paper, but what happens to everything that AI can’t make abundant? I’m talking about beachfront property, desirable real estate, rare cars, fine art, luxury goods, and anything else that has a finite supply. There are only so many houses overlooking the ocean, so many rare Ferraris, and so many desirable places to live. If everyone suddenly has more disposable income to spend and free time, wouldn’t demand for these things explode? What stops people from hoarding them or driving prices through the roof? And here’s my bigger issue with the whole concept. At least in today’s economy, there are opportunities to improve your financial situation through hard work, education, career advancement, entrepreneurship, etc. Obviously, nothing is guaranteed, and plenty of wealthy people inherited their money, but the opportunit