The ideal bitachon is to trust in Hashem, and to know that Hashem can help in various, and even infinite ways.  If one had bitachon in that spirit, he will merit salvations.  But when one thinks that Hashem will help him by a specific means, it limits the influence of bitachon. ~ R’ Elimelech Biderman Shlita

For example, don’t just daven that your parnasah should come through your business as that limits where it can come from.