Welcome to Opinionist! On Sundays, starting today, DCist will publish opinion pieces about life in D.C. The views expressed below are solely those of the author. Six months ago, I plunked down what meager savings I had and purchased a few hundred square feet of condo in the Brookland area of Northeast Washington. I had been living in a Columbia Heights rowhouse, surrounded in coffeeshops and bars by the newly rich, made wealthy by…