Amazing work.. Can't wait to see the DEX.. when will it launch?

What does this mean? Sorry but I'm new to this and don't really understand.

Are you saying that everytime a good news comes out I should sell? This is so confusing 

Is Ethereum a good buy now? I saw that it dropped a bit the last 2 days... I hear many people talk about the possibility of $1000 by the end of the year, is this true? What do you think should I buy now or is it too late?

Thank you very much this is very interesting for me. I found about Bitcoin very recently and bought it for the first time last week..

I didn't know you can sign message! It sounds useful, but in what kind of situation would it be used for?