Maybe rather than seeing it as _a_ currency we could see it a special purpose currency for money exchange? A transport medium?

If you are trying to keep your coin over a longer period of time you suffer the high volatility and are at the whims of gamblers. But if it is only used to perform a money transaction which otherwise would not be possible/too expensive/too dangerous, only to be exchanged against a fiat currency immediately after, that could be its role.