Re: Is Bitcoins safe?

Is it safe to keep all of my assets in Bitcoins? And how Department for Combating Economic Crimes, can affect my account? What permissions they need , to freeze all my money ?

I'm not sure what you mean by "safe" , If you mean storing so no one really finds out about them then yes most likely you can do that . But if you mean selling all and buy BTC instead then... no one can be sure about that , price can decrease with time and can increase .. It all depends on many factors such Miners wanting to continue mining (If they see profit) , Supply-demand etc ...
Bitcoin cannot be frozen , and if you hide them I don't see how they will find out about them honestly .

Just want to hide some money. And I dont see, how I can get Bitcoins anonymously.

First of all , you shouldn't use exchanges (at least not Centralized one) that asks you for ID , passport and other personal information's .
You can search for someone to trade with on "Currency exchange" section (depends what are the payment methods you have) and that's it , who can know what the transaction was for ? unlike buying from an exchange .
Or you can use LocalBitcoins and try to find someone to meet him face to face (in your country/city) and you buy BTC against cash.

Not sure it would be easy to find the person or website that is willing to sell me a Bitcoin in the amount of more than $ 600,000. And, who also want to do it anonymously.

yeah that would be hard. why not find several people to transaction with and buy bitcoin in small amount, it will take long but aleast you wont reveal youre
identity.