It ´s not bad! Not bad at all.
If you think you can achieve more, a static job perspective, wouldn´t help. Would it?
Of course in this case, this would also mean, that you are personally improving and making progress, much faster thank your current working environment can absorb or take advantage off.
Also, if hopping in certain working environments, is the only way to get a better salary or position, go ahead. If you are worth it, nobody! will mind.