Crypto will make some communities more dangerous. With bank cards it's harder to rob someone, because there's a lot of countermeasures like withdrawal limits, added personal verification, and the victim can freeze their card at any moment. But crypto is much like cash, which is why we hear about armed robberies, home invasions and even kidnapping involving crypto. If everyone adopted crypto, criminals would have a much bigger pool of targets. This doesn't automatically mean that there would be more crime, but it can happen if other factors are there.
I totally agree^
Crypto may not make the world a more dangerous place, but it certainly won't make it much safer. With bitcoin, it becomes much more convenient for a criminal to make illegal purchases or steal with full anonymity. Items that one can purchase online via illicit sources/websites are much more accessible with crypto, and we see this manifesting itself in the dark web and other places. Crypto may give the individual user a sense of security, in terms of the safety of their money, but in terms of danger in society, crypto is probably not helping, and if anything, it can enable danger.