If you havent seen it already check out this miniseries
Devs
I won't say any more other than the ending for it was crazy as fukk. Film room brehs can attest
Quantum comps need special rooms in order to actually work properly. A black entrepreneur could lock in contracts with Google, Microsoft or IBM who are the current big players in quantum to build these rooms. There are plenty of black physicists and software developers who have been talking about this stuff too. Quantum computers also have really strong security implications. You could use them to build stronger and harder to crack cybersecurity systems.