There are entirely legal, legitimate things one might do while still wanting to have some privacy about it. Buying porn, for example, might be something you're fine with but not really want tied to your known address.
> But the recent Pandora Papers leak has revealed that U.K. properties worth nearly $5.5 billion, according to those who've analyzed the documents, have been purchased through offshore shell companies that hide the owners' identities.
> "Using a shell company means that no one need ever know that the asset is yours," said anti-corruption activist Duncan Hames, Director of Policy at Transparency International. "Indeed, the British government probably doesn't know."
People can simply crawl the blockchain for addresses that have a good amount of money and then check which of them they can relate to persons.
If they know you and how much your crypto net worth is, they might start to attack you in some kind of way to get your private key.
If you tornadoed that money in an address that can't be linked to other addresses anymore, the work to relate the address to you might be too big so people won't try.