Yes crpto scam is a global issue since cryptocurrency are global currencies but the fact is before we have agency that will help in the tracking and preventing this occurrence it have to go through the government and as we all know no country have fully accepted cryptocurrency as a legal currency within they jurisdiction.
Well, we can't say fully but there are a lot of countries that already accepted Bitcoin in their country, well to be exact, legalized Bitcoin in their country. But the fact that there are a lot of exchanges that are being hacked, we can't be sure how much this will affect the people around it to use Bitcoin. Crimes regarding these will increase for sure so as a user of it, we should be wary of it and be knowledgeable about how we could protect out Bitcoins from these hackers and scammers.
If you need a real example and i can give you one right now about how the hacked case of exchange site will give a negative impact to the bitcoin. If you remember the last week drop in bitcoin and it caused by the hacked case combined with tether and bitfinex scandal that already happened and this time bitfinex has fallen. Remember about crypto has used encryption that attracts scammers. They get real-time encryption and consider anything in the crypto encrypted by SHA256.
Someone above you may be wrong about the agency that can help to track and prevent it because it's too difficult without any help from the 3rd party like exchange site to track it. I mostly agree with your last words about anybody's knowledge is something that can determine a lot in this case.