Given that most of us believe that Bitcoin will increase in value over time, you will want to spend it instead of Hoddle and let it appreciate.
Example: Suppose I bought a car with 1 Bitcoin today, but the value of Bitcoin doubled next week, which means I'd better use fiat currency.
Do you think so?
What if you purchased a car with Bitcoin today and value drops next week like it happened recently, that means you would be better using Bitcoin for payment.
Long term Bitcoin may proved to be much better than fiat currencies, and I doubt I would use it everyday for purchases if it was legal tender in other countries,
but I would use it there was some special discounts for purchasing with BTC.
You can even buy a pizza or beer with Bitcoin, but don't regret later if price jumps to 100,000 or million usd.