Bitcoin as the first cryptocurrency was not just created for investment purpose, it was actually created as a means of payment
Actually, bitcoin was never created for investment purposes. You correctly noted that the initial idea put into bitcoin was a means for payments for goods and services.and to be honest, the adoption process isn't as fast as expected,
Reality doesn't necessarily have to match expectations. 
but one thing that am very curious about and I have been thinking on how to go about it as a business man while accepting it as a means of payment is it volatility, though it might be advantageous for holders, but am not that certain for a business men.
For any business that accepts bitcoin as a means of payment, volatility is a headache. I believe that all income received in bitcoin should be classified as investments (for several years ahead, at least) and excluded (temporarily) from the business turnover. Because when the price falls, it will be unprofitable to "cash" these bitcoin and, in a sense, the income received in bitcoin is temporarily "frozen", because it cannot (unprofitably) be "extracted" into profit or directed to support and development of the business.In a situation whereby you accept it as a means of payment while selling off your goods, then when you are out of stock, so you decide to restock your shop, so by then price of Bitcoin has dip so much that you can't buy all the goods needed in your shop, due to the fact that your money has depreciate in value because of the dip, what is the way forward in such a situation if your emergency funds can't cover up for the shortage?
It is better not to allow such a situation, for which it is necessary to have reserves, and income in bitcoin should be “temporarily excluded” from the company’s cash flow.