1. gold as collateral.. not really. unless your willing to hand it over to a trusted third party that both sides can agree on.. as an escrow
2. bitcoin has a more volatile price and a higher perception of deflationary value. any loan more then a couple weeks repayment would require a much higher collateral to obtain bitcoin.
3. its much easier for you to just sell the gold and pay off you debts. after all that 5% along with other debt interest would far exceed any gold deflationary value appreciation.

you really would be better off selling the gold to your "rich friends" and ask them to just hoard it and you buy it back off them (for sentimental reasons) later, when your situation improves