KYC can prevent money laundering cases, but money launderers are smart enough to move their funds from one place to another and know how much money they can spend in one place.
But on a serious note should every huge transaction be termed for money laundering, this is just a common mentality that when it has to do with huge amount transaction then the AML is involved, is it that easy to scam ànd cart away funds, we have a good number of businessmen making their cool money without being dependent on any bank, exchange or government to save keep their money, they turn the money into assets they can easily convert into money when necessary.
Of course, they are so experienced in money laundering that it can make it difficult for casinos and other places of business to trace the source of that person's funds.
And despite all the KYC and AML investigations were they able to still find out the source to their money? they will rather ended up being bribed and die down the case at the long run, am not against the government agency for performing their role but are they actually accurate with their precision on money laundering?