Good read somehow mate. I would say that maybe there is. One of Bitcoin's, or cryptocurrency's features is its privacy and lack of paper trail when it comes to transactions, and although its price point always has uncertainties and changes at moment's notice, I still feel that some shady people and organization may use it in their advantage just to get be able to transact and do business with less hiding. I am not saying that cryptocurrency transactions are what fuels increased criminality, but I am saying that since bad guys would do any measure to keep ahead, it's not a surprise anymore if they will use this market too.

When police can't handle something they used to blame something and bitcoin is the best target. Criminals using fiat money too but nobody cares about it.

obviously not. No bitcoin increases its criminality is sure to happen, it also depends on the people who use bitcoin want to use with bad things or even the opposite

It will be more correct - did not replace, but expanded possibilities of receiving profit in the illegal way with a bigger level of anonymity.

As i see this topic, i wonder what does criminals do to be involve in bitcoin. I think criminals using bitcoin isn't possible because bitcoin has its very own security, so how would that criminals can get into bitcoin? That ain't east just to think of.

No, I do not think that bitcoin contributed to the increase in crime.  Criminals using fiat money too but nobody cares about it.

Yes, there are a lot of criminals using bitcoin as money for crime. This will increase the probability that the police will solve the case. Some governments don't accept bitcoin. But I think very little bitcoin is used for crime.

I also once read a news about the use of the blockchain as a medium of financing of terrorism. They choose the blockchain, because the blockchain can not be controlled by the government.

A lot of people talking about criminality involved in BTC,
but it's wrong to think in that way.
Bitcoin changed tendencies, but everyone uses it in their own responsibility and way.
The same with Fiat money, it circulating not only in clean hands.