Top VCs—who see the best deals and run deep diligence—still only have a 1–5% hit rate. As an angel, you don’t have that level of access or time. Even if you get strong referrals, you’d need to be 10–15x better than elite VCs to pick winners in a small portfolio. Unless you’re investing in at least 10 companies, it’s statistically a losing game.
My experience: I invested in ~200 companies early stage (with some winners like HuggingFace, Checkr & more).