I'm coming back just for another final question: To transfer from bitcoin to pivx I need an exchange? Or can I just send coins from one bitcoin address to a pivx address? Thank you!
yes, or you can do private trading and get the pivx, this si like buying pivx, and no you can never send coins from one blockchain to another one, they use different address, don't fall for the first letter, even if they start with the same letter the hash is different, so be aware, always use an exchange