A business needs to solve a real problem people actually want solved. Investing in something trivial, like socks for kittens, won't build a scalable company. Check for genuine market demand before you invest.
The second key question is all about the market. So what problem does the business solve? Is this problem worth solving? Is the product-market fit actually proven? Okay, now it's all well and good investing in a product, but if the product is all about, well, you know, it's some lady that knits socks for kittens, like, it's probably not a problem which is worth solving for the vast majority of people that's actually going to make a profitable business.
