(Rowling is asked about dementors being “a description of depression”):
“Yes. That is exactly what they are. It was entirely conscious. And entirely from my own experience. Depression is the most unpleasant thing I have ever experienced. It is that absence of being able to envisage that you will ever be cheerful again. The absence of hope. That very deadened feeling, which is so very different from feeling sad. Sad hurts but it’s a healthy feeling. It’s a necessary thing to feel. Depression is very different.”
“I think [dementors] are the scariest things I’ve written.”

A also wonder how (and if) Crypto will influence financial system this and next decade. So far it seems disattached from the general economy and exists in parallel environment. We`ll see how it`ll come out in future. 

No, I think social media are a remedy to a disease, the disease of compartmentalized, uneducated thinking. Just as reading or studying is considered beneficial to human understanding, communicating with other people via social media is similarly beneficial. Of course, studying and learning can be put to deleterious uses, but I believe that the predominance of people who intend to do good, creative things with their learning outbalances those who intend to do evil, destructive things