Im not gonna buy anything using bitcoin. Just hold it for long term is good for me because i know that the value will increase like past years.
Other than holding, i am using bitcoin for buying tokens in ICO.
It depends on the situation of price and value of bitcoin. We can buy what we want if it has already traded and become money. The many you have BTC the merrier to buy what you want. Most important is it has a valuable for yourself and spending it in the right way.