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.