For short-term gold trading, futures are a popular option, according to Steel. Investing in physical gold or ETFs is more ...

So while 1-ounce gold bars may be more cost-effective than buying coins, if you have a lot of capital you may be better off buying a larger bar instead — as long as you have the storage for it.

If you're going to invest in gold bars, it's important to understand which weights and sizes make the most sense for your portfolio. Getty Images/iStockphoto ...

How much is a kilo of gold in pounds? One kilogram is about 2.2 pounds. If you’re carrying a kilogram’s worth of gold bars around, it’ll weigh around the same as a storebought pineapple.