I think both can be correct. Some people tend to exaggerate their wealth by buying stupid expensive shit (like clothes/car/etc..). Some people hide their riches

I think both can be correct. Some people tend to exaggerate their wealth by buying stupid expensive shit (like clothes/car/etc..). Some people hide their riches by going cheap and not talking about their investments or second-houses. If you get to know the person more, you can actually know/guess. Usually, it's a redflag that deviates from what their standard is. (ie: A big purchase, having significant instruments that are only accessible to privileged people, or struggling to pay a small a bill when they have an expensive car)