Then you're holding on to Federal Reserve Notes, which lose value over time at unpredictable rates.

There's a market there for a less volatile altcoin.  The folks who are still here have just gotten accustomed to fluctuating prices.  There are investors who play the stock market, and then there are those who focus on other areas in the private sector.  At some point, there's a need for fixed storer of value that is, if anything, slightly deflationary.