It's hard to find things that won't sell online.
Entrepreneurs must be willing to be misunderstood for long periods of time.
If you do build a great experience, customers tell each other about that. Word of mouth is very powerful.
If you don't understand the details of your business you are going to fail.
If you build a great product or service, people will talk about it. But it starts with having something that's worth talking about.
There's so much stuff that has yet to be invented. There's so much new that's going to happen. People don't have any idea yet how impactful the internet is going to be and that this is still Day 1 in such a big way.