FIFY
The best investment is in tzedaka , Rather invest in tzedaka (and if needed R'L use it) then in life insurance where you don't give tzedaka but you don't take from it.
כשם שפרצופיהם שונים כך דעותיהם שונות
and I wouldn't comment anymore on this topic BL"N
I agree that tzedaka is probably one of the best things to do with one's money.
That being said, it doesn't negate the prudence and need to financially plan for the future (though we know that א מענטש טראכט און ג-ט לאכט, and we can't plan anything with certainty). If you go to sleep every day with $0, and don't ever save or plan for the future, then you can argue that this is the way you choose to show your בטחון. There are יחידי סגולה that can live that way. But if you engage in any type of saving or planning for financial future, then it's just a matter of choosing to ignore the way life insurance works, rather than a principle based on בטחון.