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Yes, it is safe mining site

The first advice that I can give is :

Do not rush into mining!

Read all the articles and tutorials that you can find and after you have a clear picture about the subject you can start to test it.
If you are satisfied with the results then you can progress and expand your mining farm step by step.

Yes i am reading articles and tutorials since i joined steemit.Now i am familiar to crypto a little bit but it still require sometime