What are the industries that are really unpopular and profiteering?

Formaldehyde detection and treatment project

Few companies in this industry spend money on TV advertising. Unlike buying air conditioners, they can think of Gree. They don't have a well-known brand except formaldehyde. Because it has no such thing as a mobile phone, something that consumers can experience. Our business is to provide professional technical services, and the service effect is the result of re-inspection. Therefore, the accurate promotion of this business is to put in public service advertisements, and the conversion rate of hard advertisements is extremely low.

Glasses industry

The glasses industry is already a transparent industry. I remember in high school, our chemistry teacher told us that in the future, you would buy glasses 1000 yuan and make a counter-offer 1000 yuan. Do it or leave. Since then, none of my classmates have bought glasses above 200 yuan, so now the glasses industry can only deceive people who don't understand. There are not as many people doing this piece as there were a few years ago.

Funeral industry

This thing is a real windfall, which has been exposed on TV more than once. The urn, which costs tens of dollars, can sell for thousands of dollars after packaging, and so can other things. However, not everyone can do this industry. In many places, the funeral industry is monopolized, and it can't be done without a strong backer. There is also a premise that you are willing to do it. Of course, you are willing to do it when you make money.