You should explain them the benefits of accepting Bitcoins as payment. Your transactions cannot be traced by government and so your income will be tax free.Payments once you got through bitcoin cannot be replaced to customers.You should explain these benefits
In addition to benefits, there are many negative factors.
Business is a risk. And business in which bitcoin will be used is a risk doubly. It repels businessmen.
Only the government can stimulate the business to take bitcoin. For example, if operations with the crypto-currency are exempt from taxes