Earlier quoted context omitted.
You're talking about billions of... dollars. Sounds to me like more scams exist because of fiat. Are you implying that scams don't exist with dollars, and it's the crypto alone which makes for fraud? Or is it that, if it's abused for corrupption and fraud, then it's hurting people so we should do away with it, like fiat?
Of course scams exist with dollars. Scams exist wherever people hold things of value that others want. People want the USD. I'd argue that crypto is mainly a dollar/fiat scam, as getting their hands on fiat seems to be the point of it. "I'll trade you magic beans for those USD" isn't about the beans, its about the USD. People are free to trade BTC on the blockchain no matter what the US government says. It's anonymou…
You are along the right path. Now take it one step further - what if "fraud and criminal behavior" is against despotic regimes like Taliban or Putin or dictators around the world? See my examples here: https://news.ycombinator.com/item?id=32406095