Actually in myetherwallet scam, I am one of the stupid bitcoiner that being scam. They sent an email as the same as the email of campaign manager at bounty asking for my info like KYC and asking my private keys.I thought it was legit because campaign manager was always sent an email update to me. So next day I found out that my coin was stole. So I can say that scam is the biggest crime here in cryptocurrency.
How much you have lost of how much were lost from the same scammer? I dont think your case can be called as the biggest crime in this cryptocurrency history, probably it was the biggest for you only.
The biggest crime in Crypto currencies are the fact that private centralized institutions hijacked the whole experiment and then caused all these problems. Satoshi did not want people to do P2P transactions via 3rd part centralized services, he wanted people to trade 1 on 1.
These centralized services used exploitable code and hackers and thieves quickly realized this and they targeted these vulnerabilities. So Bitcoin was not responsible for these hacks, but rather 3rd party services with weak software.
I have to agree that the centralized 3rd party service has broken the main purpose of the bitcoin/crypto creation but I cant deny that their existence as the third party helps bitcoin enthusiast to convert their bitcoin into fiat or into other coins easier than P2P transactions.