The first day of class, the sight-reading teacher says to us "most of you will become teachers...". 
Very disheartening.
If you look at it the other way, that could be a very positive statement. Which lifestyle would you rather have:
1. living in a suitcase always on the road.
2. probably dirt poor most of the time.
3. rarely around loved ones
4. a faint chance of "success" in the material/fame sense
5. great piano chops
7. frequent chances to perform in front of an audience (hopefully an appreciative one)
This is potentially a very lonely and ego-serving lifestyle, but you do get to do what you love doing.
OR
1. Living at home nurturing relationships with loved ones and building a family.
2. a stable financial base (not rich, but stable)
3. ability to plan for a retirement.
4. pretty darn good piano chops
5. ability to perform in front of an appreciative audience (recitals, school performances)
6. The constant joy of knowing you are helping share your love of music with others
7. The joy of seeing the "light bulb" go off in a kids eye when they play something for the first time and "get it"
8. Potentially thousands of people over your lifetime who will always remember you for the impact you had on their lives as their teacher.
9. The ability to spend your time day in and day out doing what you love.
This is a ego-less lifestyle in which you still get to derive great joy from focusing on what you love.
Piano can be a very narcicistic activity. Countless hours by yourself honing your chops. You can choose to continue the lonely lifestyle in search of the ellusive fame and fortune so very few are lucky enough to stumble into after a lifetime of grueling work, or you can plan to come out of your shell and share your world with others in a positive way.
It's really up to you. I've tried to be a rock-star in the past. sleeping on the floor of a van driving endless miles late at night to play one random club after another. dirty. poor. missing friends and family.. sure it has its rewards at times, but those rewards are generally only self-serving. In the end, is that really worth it?
-Paul