A version of this article first appeared in CNBC's Inside Wealth newsletter with Robert Frank, a weekly guide to the high-net-worth investor and consumer. Sign up to receive future editions, straight to your inbox.Investment firms of the ultra-wealthy, such as the family office of Jeff Bezos, are making headlines with massive fundraises for artificial intelligence startups.Late last month, Bezos Expeditions co-led a $405 million round for robotics startup Field AI with backers including Laurene Powell Jobs' ...