In the end, the fewer people who use bitcoin (or any other cryptocurrency for that matter), the lesser its inherent value is and the fewer applications it will have/will be developed. Luckily, people have all kinds of ideas and everyone is entitled to his/her own opinion, therefore everybody uses/utilizes it as they see fit.
Well, the most important thing is adoption. If you can't buy things with bitcoin, people are not going to use bitcoin. Once global adoption really happens, which will be gradually, then people will use bitcoin much more. Even if they don't, you don't really lose anything for accepting cryptos or any other form of payment.