To be honest Bitcoin value is not stable yet I don't see the point of using it, some Bitcoin enthusiasts use them though.
To use bitcoin you need not to worry about the stable value of bitcoin, but only for holding purpose. You may make use of the price of bitcoin which is currently more fluctuating. Yes, when you turn as investor you will love fluctuations for sure.
Sometimes it is better than that. It is so fast and very comfortable on what will you just pay for the transfer fee. It is so little you wont even feel that they got a fee.