Porcelain fractures.  Porcelain is very hard, but quite brittle.  The
fracture may have started from an imperfection in manufacture, or
perhaps you bit on a hard object like an olive pit, or you grind your
teeth at night or the tooth was not properly prepared...
    Certainly having a crown fracture in one month is at the least bad
luck.  Whether this happens again depends upon the cause.  You should
speak to your dentist about this.  I know that if one of the crowns I
made fractured in a month, I would give the option to the patient of
replacing it for free.  Other materials should be considered.

Steve