Recommended Gold/silver ratio on a portfolio

Hi

Not sure if this is the right subtopic but here it goes. Right now I have been holding only physical gold for about 3 years. I have been storing it at my parents' and myself live in a rental with friends. My parents are going to separate so I want to move my gold.

I was thinking about selling my physical gold when we would reach a new high (euro terms), then use the money to buy back gold at (hopefully) lower price that would cover premium at goldmoney.com and have them store it for me. I could also store it at my bank ofcourse but I am a little skeptical about that.

Now as I currently have only gold I was thinking I should mix things up with silver aswell.

What do you guys think I should do storage-wise and ratio wise?