Imagine you had no money in the bank. No investments. You didn't own your apartment. You didn't have food for tomorrow. All you had was enough to eat TODAY! How would you feel?
Anxious? Nervous? Tense? Many other negative emotions? Probably. That is the typical reaction.
Chazal say something amazing:
If one has food for today and worries about what he will eat tomorrow, he is of small faith!
That is a tremendous expectation but that is the minimum. To have ONLY for today and not worry about tomorrow. To be in THIS moment. WOWWW!!!
There were Tzadikim who COULDN'T SLEEP if they had a penny in their homes. They gave it all away to Tzadka and the next day made sure they had what to eat and so they lived.
In these SUPER-UNCERTAIN times, working on our EMUNAH is a great AVODA!!