I'll talk about money with people close to me. Maybe not specifics but whether we or they are struggling, how expensive things were, when friends were saving for a mortgage and doing a renovation.
At work we all pretty much know what each other earn because we know what grades they are and it's transparent which I like.
I would confide in a friend if I was struggling and hope they would with me.
Lots of us are broadly matched in terms of income with some outliers at either end of the scale.
I don't think it's vulgar at all.
But, I have one particular family member who constantly talks about what things cost, how much they earn how much their house was.
When they had lots of money this was very boastful and made others feel bad including how much individuals gave them as wedding cash.
Then their circumstances changed and it's all about how skint they are, how little they earn etc and again, it seems intended to shame or make people feel shit.
Even comments on how much food is in your fridge (a normal amount) or whether you pay finance for a car.
I know why they do it, because they grew up poor and this has created a fixation on money but it's very wearing.