Gold bars:
Gold bars are tangible, we can be sure they exist.
Their value will never fall to zero.
They are neither a liability nor a security.
Lower margin than bullion coins.
Low risk.
Relatively low liquidity, especially for bigger bars
Shipment, storage and insurance costs
Burglary or theft risks
A friend once introduced me to a Gold company that lets people invest their money into, and according to him, you can also convert your Golds to physical form and they will send it to you. But I dont really know if its true, cause I havent tried it. Maybe you can check it out and do more research more about it. The name is Bitgold.