You've probably heard of the cases in which persons carrying large sums of money are assumed to have been involved in the drug trade and have their money confiscated by the police, in a legally sanctioned procedure, without ever being charged with a crime.
In New York City, many ethnic Chinese are involved in cooperative financial arrangements, where people will pool money to buy each member of the group a house or an apartment in turn. Typically, the buyer shows up at the closing with an ordinary shopping bag, containing a shoebox full of cash.
It is all completely above-board, laudable even, but it gives law enforcement types fits.
Being on the receiving end of the asset forfeiture laws is very good business if you can get into it. Unfortunately, right now, government seems to have a monopoly in that area.