Honestly if that is all they are hoping for, I sincerely hope they fail spectacularly. The world is unequal as it is and I certainly don’t want the rich flexing their wealth with vanity like this, especially not considering the climate cost of all this, and the fact that we are already in a climate catastrophe that is disproportionately caused by the rich while harming the poor.
Even if (a big if) Boom can come out with a supersonic passenger jet that is economically viable, you can be pretty certain it will be for people who routinely buy business/first tickets (or fly Netjets/other private) today.