Not poisonous.
Most succulents are non-toxic. Not only are they non-toxic, they are also delicacies in the eyes of some foodies.
But it is true that some succulents are poisonous, and only a very small number of succulents are poisonous.
Moreover, the poison of these succulent plants will not be emitted, and it will never be inhaled like smog. It is also difficult to inexplicably mix it into food like gutter oil and eat it without knowing it.
They just exist quietly in their juices, waiting for one day to be a foodie like Shennong, and a naughty child whose parents don't keep an eye on them closely enough.