Crypto can provide them with precisely that. The volatility of crypto is immaterial, what matters is that it's still around. The resilience of Bitcoin means that rich people can park wealth there. They can trust the protocol more than they can trust their nation's banks, their political institutions, and their social order.
Techies can make a nice side income arbitraging the scrambling of the global elite for a safe haven. It's the new Cayman Islands bank account, only now it's math keeping the filthy government's hands off your money, not the flimsy sham of sovereignty.