I am guessing the consensus is to make a profession of performance, you must have a Masters in Piano Performance. Perhaps a Bachelors' would pass, I am not sure. It would seem that, if you can play your stuff well, Bachelors' and Masters aren't that important. I mean, some people with Masters might not play nearly as well as those with Bachelors.
The question should not be: Am I good enough? But rather: Am I willing to devote my life to this? An average concert pianist, in my estimate, practices at least 8 hours a day. I know that Song-Yuan Tang, a Chinese pianist who won a scholarship to Eastman School of Music this past year, practices 12 hours a day. (He is playing such works as Reminiscences de Don Juan, the first movement of the Rach3, etc...)
Another issue is: Would you be doing this for yourself, or for your teacher? If you do not love piano with a passion, it will be impossible to succeed at piano as a career.
Also, there are many, many great pianists who are not concert artists, but instead make their living off of teaching. The mainstream circuit of professional music has only a limited amount of space for the top concert artists.
I think you have to also have a combination of luck and extremely good contacts to succeed too --- look at how Lang Lang got his breakthrough, filling in for Andre Watts at the Ravinia Festival. Obviously, if you know somebody high up in an orchestra, they could set you up with an audition, and who knows where you can go from there.
P.S. Many people may tell you that you should become a concert pianist. I think more than anything it is a compliment. Most of the people who say this have no idea what it takes to do this as a career. Whereas if a renowned teacher or performer tells you this, take it with more weight.