Ibn Ezra says that Hashem promised Avraham Avinu lots of Schar for having Bitachon, that he went to war with so few soldiers against four powerful kings. The Chizkuni says he was promised lots of Schar for his Bitachon in Hashem regarding his assets (לִ י הַ כֶּּסֶּ ף וְּלִ י הַ זָ הָ ב חגי ב ח Hashem has all the money in the world); he declined Melech Sedom’s offer and didn’t take anything from him.
When an open Passuk in our holy Torah says you’re getting lots of Schar, it must be for doing something that is a super-rewarding accomplishment. The Medrash says that one day Gan Eden will cry out and say: “Give me ONLY Tzadikim!” Which Tzadikim? Those who had Bitachon in Hashem”. From the fact that it gives a person tremendous Schar, we see that Bitachon is especially Chashuv.
And punishments don’t do well with Baalei Bitachon, as the Ramchal says that the power of a person’s Bitachon during his lifetime will pull him out of Gehinom. The Chovos Halvavos says that the Schar of Bitachon will be: הוֶּ לַ מְּ accompany a person in Olam HaZeh and in Olam HaBah. People get involved in Bitachon to calm down from their issues. They don’t realize that it’s a Mitzva that you are M'chuyav to do.
For good reason there is so much Schar and goodness available; Bitachon is the most precious Midda, and the main reason the Torah was given to us. (Gr”a). I advise getting involved in Bitachon as much as you can, preferable a longer: דֶּ סֵּ ר קָ בוּעַ set time. Hashem loves this Midda especially, and He rewards every tiny effort; especially if you’re having a hard time with having Bitachon. לְּ פוּם צַ עֲ רָ א אַ גְּ רָ א The reward increases according to your effort.
