Yes , who have bitcoins they are have sound money. with in year of days the bitcoin market price have changes to earth to mountain. in future also we will not catch bitcoin. now its good time for buying bitcoins.
It definitely is sounds like money, really its only simile. I don't have the grudge to compare it in a metaphor manner. Because although they are both currency, still on a different basis, one is on the physical world - tangible whilst Bitcoin is in digital - intangible.