>>510757914this is standard Jewish belief. if you lose money you thank God, only good things can come from this. gaining money though? it might be a reward from god, but it could also be a curse sent to destroy you, so for this instead of being happy you pray and become cautious about it. Such is the rabbinical wisdom.
if you get more money you must also donate that, you become a waterwheel and each turn is gaining you merit