What are the security and reliability concern of cloud technologies?

I am trying to understand really hard how some people who have no experience on networking, IT security or topology go to google write " &%&$###%^&(?" a qustion and copy paste things to show me a point they dont actually understand.

     There sure are some concerns on cloud platforms but than again the cloud root trace and entire topology depend on the type of connection between servers, units and end users. 

      There always are riscks to any connection but there are very safe networks as well. On the other hand you can see16 year old Chinees and Indian hackers going to the serverc of Nasa and going in.

Security concerns:

1. Is my sensitive company information private?
2. Do IT companies or SaaS companies adhere to their marketed privacy protection?
3. Is resource sharing always positive or do I want to keep some business intelligence from some employees & layers of organization?
4. Do I need internet banking protection level or average level or low level?
5. Can my “cloud system” be hacked?
6. How can I insure that oversees employees or home-workers do not share my business information with others?

Reliability:

1. Do I dare to conduct business over the fragile web instead of a controlled network environment?
2. Does cloud technology offer scalability to my business?
3. Is cloud technology more or less stable than local internet (on-company or company owned dedicated server)
4. Is the SSL-protection offered by the3rd party service provider trust-worthy, or do I want to choose my an SSL-certificate myself?
5. How & how fast will my employees react & adapt to this cloud technology?

What i know is there is no security when we process data using cloud technologies, either it is word or excel or any advance software, it uses  many platforms when it is provided by third parties. Whatever the providers say I doubt how our data not be compromised.

With all this sharing of storage space in the “sky,” one of the biggest concerns expressed by those considering switching over to cloud applications is the safety of their data and their clients’ data. It’s a concern cloud vendors have been fighting to overcome for years.