Do you think if you sell popular products, you will be able to generate sales and make money? Popular products need no introduction so you might be tempted to think, these products make you a lot of money. But the truth is best selling niches also have a tough competition. Since small, medium, and also big businesses are selling on these niches, it will be very hard for a new player to survive this competition. Toughest thing is you will have to fight against big business and brands. Therefore, if you want to build sustainable business and generate sales and profits, you should choose a niche that has a small market size and has less competition from the sellers.