Because of bitcoin does not give public details of people who make transaction with it, some people do say it promote crime. People needs to understand one of the features of bitcoin is freedom that anybody can get access to it, it does not discriminate. The privacy features of bitcoin is very important to humanity, which I know one of its advantage is for safety by using cryptography that makes all transactions safe and encrypted.
Privacy in transactions of bitcoin is much important, if their was no privacy it would have cause several criminal attacks. For those who think bitcoin encourages crime because of hiding public data of users don't understand the importance of bitcoin being private. Before bitcoin started existing monetary crime have been existing. Bitcoin is not a reason for monetary crime, bitcoin is just for everyone and does not discriminate but accept everyone.
I want to use the story of earth creation to buttress your point.
I have known for a fact that every religion, society, community, acknowledge and have a name for the creator of this earth. So let's just use the name we all know, which is God.
When God created earth, it wasn't His intention to create evil to spoil the good work He did. Evil however came to be, still the earth remains and good still thrives for those who believe in it.
Satoshi created BTC as a decentralized money to solve a major problem of finance, in as much as the idea is good and works better than the way it was initially designed to function, it has led to other note-worthy initiatives. Still, it doesn't stop those with an evil mind to use this good work as a means to soothe and satisfy their evil needs.
There's always going to be good and bad/evil. If BTC remains original to the idea of good, just like other good creations like A.I, Web3, it still is, but it won't stop criminal minds or scammers or hackers or money launderers from using it to their benefit.
Hence, why safety from these devils or evil minds is taught in the form of how to secure your private keys, how to detect and avoid phishing sites, how to secure your browser and hide your information from close friends or family acting as spies, how to use secure wallets for your coins.
Bitcoin definitely has nothing to do with crime, but it is the users or customers who have such evil intentions that use it to perpetuate their crime. karma or whatever good forces out there will always be available to serve justice to the criminals who get caught using BTC or decentralized network for their crimes.