That's really shocking to hear such kind of experience. Bitcoin transactions are not so long to loose money on the price difference and bitcoin doesn't jump from 100$ to 2500$.
I thought a business which based on bitcoin is developing very profitable from a day to day. I remember a story when some guys were selling pizza per 20 BTC each! I doubt that their business ended the same like yours.
Not all business are profiting from bitcoin, I believe business setups in bitcoin are the same as business setup in a normal currency except that they are using a cryptocurrency. This business still needs to promote and advertise. Their success depends on the success of their marketing strategy. Anyway, a person should be well aware of the right transaction fee to be able to send Bitcoin in the most fastest way in order to minimize the changes of rate between transfers.