"Intelligence is usually easy to tell in a 10-minute conversation. Determination is harder." — Sam Altman

I think extreme secrecy is a bad sign in all startups. Very few startups die because they tell you exactly how their technology works. On the long list of startup killers, that's pretty far down. Though on the list of entrepreneur fears, it's pretty high.

AI will probably most likely lead to the end of the world, but in the meantime, there'll be great companies.

Whether or not money can buy happiness, it can buy freedom, and that's a big deal. Also, lack of money is very stressful.

There's this famous observation that I totally believe: Great startup ideas are the ones that lie in the intersection of the Venn diagram of 'is a good idea' and 'looks like a bad idea.' So you want most people to think it's a bad idea and thus not compete with you until you get giant. But for it to secretly be good.