The more payment methods, the more potential customers - it's hard to see why anyone would hesitate not to add Bitcoin as one in a series of payment methods. Although I understand that only Bitcoin as the only method of payment can cause suspicion in some people, because the myth that Bitcoin is something used by criminals still lives on.

2-3 years ago I was in a physical store that sells IT equipment and asked the seller if they plan to accept Bitcoin as a means of payment, to which he replied that they are not a dark web store and that they only accept legal payment methods.