Most wealth advisers say that only a few of their clients have asked them for a sustainable-investment portfolio. And yet when asked, the majority of investors say they are quite keen on the concept.

As AI startups continue to proliferate and the sector rallies the stock market, family office investors are increasingly wondering whether artificial intelligence is a bubble that’s about to burst.

Druckenmiller’s Duquesne Family Office cut its Nvidia Corp. stake in the quarter that ended Sept. 30, according to its 13F filing, the first time this year that the New York-based firm disclosed a drop in its holdings of the major beneficiary of increased AI interest.

Some of these experts are in-house geopolitical strategists and macroeconomists, while others are former military personnel or diplomats serving as consultants.

An analysis by the compensation consulting firm Johnson Associates attributed the muted bonus payments primarily to rising interest rates, bank failures, weak merger-and-acquisition activity and overall economic uncertainties.

The market for the priciest properties in the city faces challenges such as a new tax on luxury sales and turmoil in the entertainment industry. Now, some homeowners are turning to another path to generate cash: Renting them out.