We've heard exchange getting hacked and millions of dollar worth crypto being stolen.
Last year, Myetherwallet was exposed and hacker penetrated and stole alot.
Scam ICO made away with millions in recent years.
Crypto traders and investors are taking precautions so as to not fall victim. This doesn't guarantee Scam free Crypto space coz right now someone is being scam.
What could be the biggest Crime in cryptocurrency
Mt.Gox was and will always be the biggest crime, in terms of number of bitcoins, but perhaps not usd$.
That Mark Karpeles is laughing with everyone's coins still. He will come out of his 3 month prison sentence with billions.

He should be hung, the amount of lives he ruined is as bad as the bankers.
https://www.coindesk.com/mt-goxs-mark-karpeles-found-guilty-given-2-6-year-suspended-sentence