In the US, that doesn't mean anything legally speaking. They might know then that this means you have a lot of cash on you, but that's not probably cause for a search. They still have to get permission or a warrant to search.
https://www.oyez.org/cases/2012/12-246
I don’t see how telling the officer you have $87k is probable cause for a search, anyway.
First, it is not illegal to have a car or cash.
Second, in the US at least the government does recognize a limited right to privacy in the form of the 4th amendment which spies to States as well. An officer cannot search you, your car or your home without a warrant from a judge or a tangible reason to believe you are committing a crime.