IONQ, RGTI and QBTS should have similar values in their market capitalization.
IONQ stock is currently too expensive for a speculative investment;
QBTS stock should be moving up towards IONQ, while IONQ should come down gradually.
RGTI should catch up with QBTS in its rise.
Over all, the RGTI stock is the safest bet on Quantum Computing at the moment, any price below $1 is a steal. YMYD