Wrong question, I think.Bitcoin aspires to be a currency and is presented as one, at the same time as trying to boost adoption by presenting itself as a cannot fail investment (hence built-in depreciation, mining etc), so I think it's a fair question.
If I declare white pebbles currency, and that there are only 20 pebbles acceptable, and each year I'll throw one into the deep sea, I have an appreciating currency. What is missing in my pebble currency is confidence, an intangible and difficult thing to acquire, and an easy thing to lose.
If you want to hedge against USD depreciation, BTC is one option.
If you want a hedge against USD depreciation, given the huge volatility of Bitcoin, I'd say it's far worse than most other assets, or even most other currencies. A hedge against inflation should not be volatile, it is meant to reduce risk, and ideally it should have an intrinsic value or very predictable demand.
It should also be in a regulated market - I wonder which of these exchanges will go bust because of this crash? If they guarantee a price in USD for bitcoin to users and the price plummets straight afterward, or regulations mean they can't sell the coins, they're going to be in an awkward place. There are no guarantees that anyone who has money in bitcoin will ever be able to convert it out into another currency, because any of these companies could go bust and leave their customers with nothing. That's a very different situation from most other assets.