Diversification is the key. Try to spread your investments - this way you benefit from the "ups" and don't get wiped-out by the "downs". Most, if not all, of the precious metals are being used in industry now, so they all also have value as a consumable item.
As regards storage. Some at home in case you have to leave in a hurry. Some in an offshore vault for security.
And don't forget, put a small portion of your savings in crypto-currencies. Some in cold storage, some on a debit card.
Few people will thrive in the coming financial storm, but some degree of diversification will help us survive in reasonable shape.
RE: What hard assets would you choose to buy?