Indeed, reading the white paper will help you comprehend bitcoin the most.

Concerning risk, there is a huge risk with concentration mining in few companies resulting in the 51% attack. The only solution, the best of all solutions, is to have far more distributed mining activities.

bitcoin_beginners

I have read the Satoshi´s white paper

Carresan

Indeed, reading the white paper will help you comprehend bitcoin the most. 

Concerning risk, there is a huge risk with concentration mining in few companies resulting in the 51% attack. The only solution, the best of all solutions, is to have far more distributed mining activities.  