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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. Europe’s richest person, Bernard Arnault, built his fortune on designer handbags and Champagne. His latest bet: security guards. Last week, Arnault’s private venture arm and family office, Aglaé Ventures , participated in a $12 million fundraise for Belfry, a startup that handles logistics such as billing for security firms, alongside two co-investors. Aglaé’s portfolio also includes Airbnb and Netflix . The round marks a busy month for high-net-worth families looking to diversify. Since Jan. 1, single-family offices have made at least 24 such investments, according to data provided exclusively to CNBC by Fintrx, a private wealth intelligence platform. The dollar amounts of the investments aren’t disclosed. Here are…