Bitcoin and altcoins has made it easier because the market is liquid and cryptocoins are very easy to move, keep and store.
Easier at first glance maybe, but not really if you think about how you can be held responsible for certain transactions even a decade later with how transactions once confirmed are recorded in the ledger for ever.
Now that you mentioned it, I'm actually wondering now if there could at least be some statute of limitations applicable for some things even for immutable records on a blockchain assumed to remain there in perpetuity. At least in the manner of financial compliance, records in most countries are kept only for a period of 7 years, and then can safely be destroyed, precisely because of these statutes. I'm sure of course if you used those funds for certain crimes, you wouldn't escape any pursuit of justice although you'd probably be okay from people trying to pin you down as criminal associates just because you received coins from or your coins were tainted by some unsavoury activity.