On the surface, electric-vehicle battery manufacturer QuantumScape (NYSE:QS) offers a seemingly bulletproof upside narrative. Since the get-go, range anxiety has impeded widescale adoption of EVs. Should QuantumScape be successful in developing its solid-state battery, it could alleviate concerns due to enhanced range, quicker charging times and safer profile. Thus, QS stock is a buy or so it seems. However, the problem is, as InvestorPlace’s Thomas Yeung mentioned, “investors have become increasingly conce ...