Security risks
As with any system, Bicoin transactions are at risk of being hacked, malware and malfunctioning during operation. If a hacker gains access to the Bitcoin owner's computer hard drive and steals the private key, he can transfer the stolen Bitcoin to another account.
A particularly notorious theft took place in 2014, when Mt. Gox, a Bitcoin exchange in Japan, was forced to shut down after Bitcoin worth millions of dollars was stolen.
I do understand some of your mentioned risks but i think you are going to far just to make known some risks that are inevitable even with fiat currency. Are so called banks not robbed or even their safe broken into by thieves to steal the money of its users? Come on mate, a hacker having physical access to someone's hardware is just as robbing a bank.
Fraud risks
Because the issuance of cryptocurrencies, ICOs etc. has not been regulated by the government yet, scammers can sell fake bitcoin. For example, in July 2013, the SEC took legal action against a Ponzi program operator related to Bitcoin.
Can you give a reference to this because i don't really know about this and how fake bitcoin was minted when i know perfectly the bitcoin network will not approve of any suspicious transaction.