Will the super-rich adopt supersonic travel into private fleets?

​In a bygone era of supersonic travel, only the affluent got to travel at Mach speed, commercially. Now, it may not be just for the high-net-worth. The next generation of supersonic planes is in the works. This time, it's not British Airways, but the Americans. United Airlines has ordered the first 15 jets. It begs the question: How long will it be before the rock stars, the ultra-high net worth, and billionaires start ordering their own for private travel? 

How long will it be before celebrity CEOs like Jeff Bezos and Mark Zuckerberg start purchasing supersonic planes for their private jet fleets? Domestic staffing agencies will need to open new divisions with specially trained staff to make accommodations, or personal assistants and executive PAs will need a special certification. Time will tell.