How is this a property of "non-traceable"/anonymity? If someone physically robs the bank and gets away with a large amount of cash that is arguably even more a

How is this a property of "non-traceable"/anonymity? If someone physically robs the bank and gets away with a large amount of cash that is arguably even more anonymous and non-traceable than bitcoins. The only problem ought to be that bitcoin exchanges are not being insured, by who or that the currency happened to be bitcoin doesn't matter (as long as the insurance covers it).