This is all good advice.
It's great to have one ounce gold and the premium is better when buying it, as compared to buying an ounce of fractional gold.
The smaller 1gram gold is important to have. In the event of a meltdown, we need some change. When you need to buy groceries, you will be able to trade an ounce of silver or 1gram of gold for the groceries. This same concept is relevant for 90% silver / constitutional silver, which is also very recognizable to everybody.
Full ounces of gold are important, but having fractional gold is also important.