You are right that exact price of Bitcoin is irrelevant when you need to convert 8 hours of your day job into an iPhone. But for anything to be a medium of exch

You are right that exact price of Bitcoin is irrelevant when you need to convert 8 hours of your day job into an iPhone. But for anything to be a medium of exchange it must have value. And the value is derived solely from the desire to hold Bitcoins vs. holding dollars, euros, oil, gold, consumption goods etc. The more people on the market want to hold Bitcoins, the more liquid it is (regardless of the price). But since the amount of Bitcoins is fixed, increasing liquidity would always have to come with a growing price. Simply because for every new person to come in and buy a Bitcoin, he need to outbid all other people like him, and also outbid time preference of the existing holders. In other words, growing price of a good in a fixed supply sends a signal of its bigger liquidity. Meaning it's even better medium of exchange for you to accept (even if you don't invest in it yourself). Things don't need to be priced in Bitcoin for it to have value and to be used in exchange with this value. Things will be priced in the most stable, most liquid commodity and today it is fiat currency. Bitcoin needs to be spread to many more hands than it is today. This is what happens today and we are still at less than 0.1% of global population that is even aware that this technology exists.