The feature of a deflationary currency is much better than constant money printing. But, as I have learned through light studying of currencies, a huge negative aspect is its encouragement to horde.
Currency is the most useful when it changes hands constantly. I have mattresses. You have cookies. He has milk. I buy cookies and milk. You buy milk and mattresses. He buys mattresses and cookies. That's better than all of us in a standoff because we don't want to use our currency. Horrible analogy.