So couldn't billionaires easily take over nodes and make drastic changes? Just curious, I am interested in Bitcoins because it is people's money, however I want to understand this area more.
No. Bitcoin works exclusively by agreement. Everyone else in the world can make a change and I can choose not to make that change.
Gold advisor told me, With physical gold/silver, there are no internet Protocol rules, so people cannot suddenly elect to make changes, etc.
But that's a huge disadvantage for gold for two reasons:
If a huge amount of new gold is suddenly discovered, there's nothing that can be done to keep the new gold from being equivalent to the old gold, even though none of the holders of the old gold want that. Sometimes you need to make changes to preserve the same behavior because the world is changing.
If the properties of gold aren't perfect for using it as a store of value (and they're not) you just have to live it.
If what you want is a store of value and a means of exchange, gold's intrinsic value is pure downside. You have to pay full value for it when you buy it, so it doesn't add any extra value from holding. And if the intrinsic value changes, say due to new industrial uses for gold or old industrial uses being replaced, that harms its usefulness as a means of exchange and store of value.