It is highly sad that you think fraud is bitcoin or blockchain problem. Do you think fraud and scammers came to life in 2008? There has been a lot of scams in fiat as well and comparatively speaking there is more fraud going on in the world right now done via fiat than crypto. The only difference in the world of crypto is that you can't take the money back and if the person who scammed you is anon you do not have much to go on with and just face the fact you are not getting the money back however looking at the world that is at least cutting the loss quickly.
Good point right there, cryptocurrency do not have the support that can take your money back when its gone.
Look at amazong, dudes made 24 billion dollars profit in 2018 and requested free money from tax payers to build a new headquarters, a company that PROFITED 24 billion dollars asked for free money from the tax payers, that is alone is bigger fraud than anything you can see in crypto world. We are fine.
Well IMO, the biggest fraud is the government. If you come to think of it, If youre hired to a specific job, you need to comply all legal government related documents and pay for all these papers ( I dont know if these has been going on in the countries) . If you also want to put up a business, before you can start, you need to get business permit and licenses, and of course you need to pay for the papers again. If you take a look at the big picture right there. Government have already milked you with a lot of money before you start earning. Is that the way how you help and serve the people in your society? Of course not, but we get used to it, so it does look like just a normal routine for us.