By all means, if you have an idea, go work on it. Don't wait for anyone to validate. But if you are going to get a company formed around your idea, and start

By all means, if you have an idea, go work on it. Don't wait for anyone to validate. But if you are going to get a company formed around your idea, and start selling to customers (and supporting them), and (ack!) hire employees, having at leats one co-founder is almost a requirement.