I am doing jewellery business.
1) Are you sure you can sell it back at 100% coz according to Malaysian law, if you want to sell gold, the buyer who buy from you will deduct 25% of the current gold price
2) Gold price is VERY fluactuate recently, what make you so sure that gold drop won't drop dramatically in short time. If gold price really drop, even you can sell it back, you should calculate that how much you have loss. For today gold price is RM122.00 per gram. Let say if you buy today, after a week gold price drop to RM115.00 per gram, you will loss a lot of money.
So, there a lot of factor to be considered before buying gold.