Pedestrians obviously do that all the time, and assuming that you start crossing from a stopped state and not at speed, it seems to me that a bike is as visible or more visible than a pedestrian (about same height, much wider, similar speed).
Crossing from a stopped state at walking speed is probably no less dangerous than walking, except that maybe it’s harder to stop on a bike if a car decides to turn through the intersection. Either way, if I have to cross a pedestrian crosswalk on my bike, I’ll get off the bike and walk it. More considerate to pedestrians and no risk of going at a speed that cars have trouble predicting.