Let’s say you are a criminal with millions or even billions of dollars, then you must know how money laundering is carried out. If you don’t, then you have one big problem. Transferring large sums of money or carrying suitcases of cash will raise eyebrows. You need to “launder” the money to make the dirty money appear to be clean.
This is how politicians, drug dealers, criminals, fraudster & scammers with millions or even billions of dollars launder money. They make dirty money look clean so that it can be spent anywhere in the world (say on real estate, luxury yatch, strip clubs).

Below is how they do it fully
https://gombiland.com/how-money-laundering-is-carried-out/