Many do-it-yourself investors don't need an advisor—they enjoy the process and successfully meet their needs over time. But there's a third group: investors who began managing their own portfolios, sometimes successfully, sometimes not, but are now questioning whether they're still on the right track. Complexity has crept in. Time is limited. Markets feel more confusing. They're not failing, but they're starting to wonder whether they're optimizing what they're doing and beginning to feel overwhelmed. Dr. William Bernstein argues that only a tiny fraction of people possess the four rare qualities needed for long-term DIY investing success. But even when someone checks all the boxes, the biggest limiting factor is often time, energy, and focus. Most investors underperform the very investments they hold—not because of bad products, but because of poorly timed decisions driven by emotions. If you're questioning your DIY approach or feeling overwhelmed by investment decisions, this might be the perspective you need.