Which platforms do you prefer to buy Bitcoin? Generally, trade sites, localbitcoins and bitcointalk sites are used.
Are there any platforms you buy bitcoin besides these?

Is it possible to send bitcoins to more than one account at the same time? As far as I know bitcoin transfers can only be done into one address.
Can I transfer BTC to multiple address at the same time using my own wallet?
Do existing wallets on the market have such a feature?

In general, we talk about what can be done for online use of bitcoin. For example, what can I do if my laptop with my bitcoins is stealed?
What security measures should we take physically?

Bitcoin is usually used by people interested in technology. I mean, persons with a certain technical knowledge are interested in bitcoin.

My observations are that way. I think Bitcoin needs to reach larger quantities. Can use bitcoin in people who are not interested in technology?
Can people use the bitcoin in the profession group like tradesmen, teachers, housewives, firemen, butchers? Are we going to see the days that these people use bitcoin?

There are many sites offering the opportunity to trade with bitcoin.
For example, https://poloniex.com/ is used for altcoin trade. For bitcoin trade, https://btc-e.com/ is being used. Apart from these, there are other trading sites.

I am curious about the business logic of these trade sites. What do you need to know to code a trade site?
How are bitcoin and altcoin addresses automatically generated? How do I transfer between coin addresses?

I have the most popular https://freebitco.in/ site I know. Do you have any site sites that you know are quality and reliable and have dice sites?
I want to play for fun in my free time?

Can Russia or China done such a thing to erase the dominance of the dollar over the world?

Generally, there are always governments behind such technologies. For example, StuxNet

Has the bitcoin system ever been hacked until now? Is there any security vulnerability in the Bitcoin system up to now?

Snowden went to Russia to shelter after revealing confidential NSA documents to the media. Could it be that he went to Russia as an agent? So he might have gone to Russia to work for the NSA? America might have shown Snowden as betraying the NSA.

Different wallet options are available for Bitcoin. There are Web, Desktop and Hardware wallets.
What are the things to watch out for these wallets? What should we do for the safety of our Bitcoins?

Hunter Hobbs spends 9 hours on the Youtube channel and has reached the last line of excel. Interesting 
https://www.youtube.com/watch?v=thvcTyJvRvM

Hi,

When a person transfers BTC, what information is transferred on the network. Someone who listens to the network can access what data. I'm curious about security.