That said, hiding evidence from law enforcement/money from the tax authorities is a crime anyways, regardless of where you hide it.
There is no duty to provide evidence of a crime to law enforcement in the US, anyway - merely to comply with warrants or the like, if issued. There is a difference.
It is also not illegal to hide money - just illegal to not pay taxes due. There is also a difference there too.
The goal isn't to lock all money down and infringe on personal rights, it's to keep it from being hidden and untaxed en masse by many very rich entities.
others have had this opinion, and it's short and sweet:
Fourth Amendment
The right of the people to be secure in their persons,
houses, papers, and effects, against unreasonable searches
and seizures, shall not be violated, and no Warrants shall
issue, but upon probable cause, supported by Oath or
affirmation, and particularly describing the place to be
searched, and the persons or things to be seized.
https://constitution.congress.gov/constitution/amendment-4/I'm a big fan of the entire bill of rights and believe in their interpretation as concrete, specific and personal. This includes the 2nd.
Back in the day this "extreme" was called the 4th Amendment to the US Constitution. But law enforcement doesn't respect the highest law of the land, and neither do the courts, and neither does the government. IMHO that makes the whole lot of them criminals.