so that judges and prosecutors have more information - in this case about Bitcoin. Examples of fraud/crimes are usually presented, in which Bitcoin or other crypto was used for the purpose.
I really hate seeing how they always try to find different ways to put emphasis on that point and by doing so, in most cases it'd change the point of view of the ones you've mentioned above towards
BTCitcoin.
Additional information on the topic: The US Department of Justice has created a team to investigate crimes related to cryptocurrencies.
I wouldn't mind seeing more people on that field, as long as it doesn't lead to "any" kind of collateral damage!