fiat is supported by governments and people see it and familiar with it .

 they dont put the blame in it but they blame the company or the people that have scammed them but for btc the insight is not the same because btc is non government supported and they didnt see btc and they think that btc is connected to the company that scammed them .
 also a criminal can easily escape if he will not expose himself outside and since btc also exist on a virtual world its a perfect match for them .

Bitcoin is just a currency, that it's been used for scams doesn't automatically mean it's a scam, the fiat currency has been used to fuel crimes from the very beginning yet it isn't been tagged a scam (meanwhile, it's the real scam). The problem isn't because bitcoin is a decentralized currency but the society is corrupted.

The scammers are seeing more advantage of the crypto currency over fiat and utilizing that, it's best the government make the adoption now and popularize the currency already to create more awareness and maybe reduced the rate at which this scams are becoming a success.

The government will try regulating the third party service provider of the industry with the hope of regulating the industry inorder to reduced the rate of the scams but that will fail too. The KYC regulations didn't work perfectly with the fiat systems in eliminating scams as the crimes are still on the increase so why then would they think regulating a decentralized currency would solve the problem?.

It is true, but at least in this respect we cannot be reckless in taking action beyond our reach as bitcoin users.
We also need to dig back between fiat and bitcoin vulnerabilities, which are criminals more targeted to launch their actions?

In this context, criminals don't see how fiat money and bitcoin are themselves, they commit crimes in various patterns. It is indeed difficult to prevent it, but we must be smart in fortifying our assets, so we can avoid evil deeds.

Well, this is a short but fully detailed answer.
That is right, bitcoin is also a currency, the same as the fiat currency that also often used by a scammer or even fraud activity. We have nothing to do with this fact is just to accept the reality that even bitcoin was abused by a scammer but the good thing is they perhaps will trace through the transaction that publicly seen on the blockhain, not like the fiat currency. Perhaps they can use bitcoin to sophisticate footprints but they can't hide one the transaction will be traced and convert their bitcoin to fiat currency.

That’s why it is being said that you can’t have everything in life, sometimes you’re going to have to sacrifice one thing to get the other, because you are not going to be able to have the both of them at the same time. These criminals you’re talking about are also normal people like you that are making use of Bitcoin the same way that you’re using it, and they are using due to the same reason why you’re making use of it which is to have some level of privacy.

If you’re going to be able to keep your activities secret with Bitcoin, these criminals are going to be able to do the same. Bitcoin offers the same advantages to everyone, whether you’re good or bad, and that’s just it. But Bitcoin’s privacy is to an extent and they will still get caught.

This is the price of freedom, you either give it to everyone or to no one. There's no way to prevent or track the criminal use of Bitcoin in a way that wouldn't hurt all users. Even now we have chainanalysis companies that claim to fight crime, but really they provide their services to anyone who is paying to them, which often includes governments who conduct mass surveillance. Governments are actually much more scary than criminals, you have a very low chance of encountering criminals, but governments are already spying on you.

It is somehow their fault in the first place and Bitcoin has nothing to do with it–it's just Bitcoin is being used as a way to scam naive people. If those people learned how to counter a scam or just do their own research, they might save their money and spend it or invest it on Bitcoin. Those bad people and lack of knowledge people are the ones making Bitcoin to look bad because they don't know the essence of having a crypto currency or maybe those bad people did but proceed on making a untrustworthy scheme.

 sometimes people are taking advantage of places to hide and much mistaken that Bitcoin is a scam without evidence which is coming from those lacking knowledge of the new technology. Totally it passes through with a negative impact was made due to anyone who has thought about that we can buy something illegal or legal, and maybe it's right. Because it's assigned to the most secure place inside the creative brain of a leader who is behind. So if we can cope with these terms it is our own freedom to select but it doesn't mean that we are free to do something wrong with the help of bitcoin.