D-Wave Quantum's CEO recently sold a large fraction of his stake in the company.Quantum computing stocks haven't been great performers over the past few weeks. Most pure-play companies involved in this technology sold off heavily, and D-Wave Quantum (QBTS 0.49%) was no exception. The market realized that these stocks had gotten far too hot, considering that commercially viable quantum computing is still years away. And with investors looking to reduce their risk exposure for a number of reasons, quantum com ...