Carvana will need to reverse these two trends in 2026.With nothing more than a passing glance, Carvana (CVNA +1.82%) looks like it's doing great. The company just reported its highest-ever quarterly revenue, as well as one of its strongest per-vehicle gross profits.Things don't look like they'll be much different for the online-only used car dealer in the year ahead, either. Demand for used cars is holding up not just despite economic headwinds, but because of them. Kelley Blue Book reports that the average ...