Is that 100 startups with ideas, you would be willing to build yourself?
Angel.co has a great article because there's enough data now to make some insights[0]. TL;DR; any credible deal - get in on it.
But it needs to be law of large numbers, so don't start until you can support 100/60/30/5 deals for your size. No matter how good the idea/team sounds at the angel level, it's likely to fail. YC still has a 50% failure rate >5 years. Arguably they're the 'great filter'.