Quantum Computing stocks: IONQ, RGTI, QBTS, QUBT

How do we feel about pure play Quantum Computing stocks (or close to pure play) for a 4+ year or longer time horizon? I realize they'll be highly volatile. But wondering if any look good to buy now then (try to) forget about it. What's a good approach? Buy a basket of them and DCA over time or focus on one (or at most two)? IONQ and RGTI seem to be the most talked about or trusted candidates right now. They may be the only ones with revenue. Hoping to learn more about those two. Sometimes I'll see GOOG, IBM, and MSFT as Quantum Computing picks but obviously those aren't pure play stocks and are unlikely to become 10 baggers.