I think if you do not dark network, you will not be tracked. The price of Bitcoin has soared, attracting not just potential investors, but also professional theft hackers that threaten us. So we should pay attention to safety, do not get your private key hackers.
In my opinion, the reason hackers choose to pay ransom for bitcoin is because Bitcoin not only has advantages over other traditional payment tools, but also is the best choice among other virtual currencies.
Hackers who choose bitcoin for ransom because of the anonymous nature of bitcoin can avoid being tracked by the government and can not find the source of the money, which is safe for them, which is why Bitcoin is so popular with criminals.