I have invested before the announcement of the new chain in ICO phase 3, will the CIF be send to my old wallet and then later swapped for new ones or will it instantly send to the new wallet?
And I have also some CIF in the old wallet, is it safe to download the new CIF wallet or is all my CIF gone due to that ?
As long as your email address is valid and you check it then you won't miss out - what I think is likely is that they'll ask those who already have $CIF or are expecting some to download the new wallet and send the address and they'll sort the rest out. They'll be announcing more on this in due course. I also have $CIF to transfer to the new wallet so awaiting those instructions - they'll be with us next week some time hopefully.
For now though you can download the new wallet (Windows and Linux, think Mac is still being tested) and have it open at the same time as the old wallet, no worries there. However DO NOT send $CIF from old wallet to new or they'll be lost!