I think BTC just good as an investment. Do you ever read or hear about 10K BTC for pizza? And that's what I mean. The price are not stable, but when the price goes up, you'll be disappointed that Bitcoin has spent. I think BTC are more like Gold, you can use it as payment system but you will disappointed when you spend it.
I completely agree with this statement, while Bitcoin was intended as a new form of payment why would you use it as such? I mean yes you are paying a set price at the time of purchase but when Bitcoin goes up or down then what you actually paid can change dramatically. Not that I would complain if it meant I actually was paying less for a good or service but realistically we might actually be paying ten times what it would have been in fiat in the near future and then I would personally be kicking myself for that fact alone honestly. However if you are a person that totally believes in using Bitcoin as a payment system, maybe you should look into seeing if your state (if your American) allows the shift card from coinbase. It works like a Visa card but takes the money out of your cryptocurrencies account.
https://support.coinbase.com/customer/en/portal/articles/2228646-the-shift-card