Investors might hesitate to buy a stock after such a massive run-up -- but don't let that scare you off.Finally! 2025 appears to be the year QuantumScape (QS 0.28%) investors have long waited for, the moment when the market appreciates what the company is doing and sends its valuation soaring.QuantumScape's stock price has soared 160% higher year to date on enthusiasm about the company producing solid-state lithium-metal batteries that excel in five crucial metrics: energy density, charging speed, safety, l ...