BMW has been riding the crest of a wave lately. Profits and sales have been vibrant. The BMW Mini has been launched with what can be described as success. But questions have been asked about future prospects. Investors have seemed nervous. Just five years ago, BMW executives mocked the 'expensive little luxury car' that is the Mercedes-Benz A-class. Now there is a BMW Mini and it is losing money. Also, a small BMW 1 Series is in the pipeline. Cause for concern?