You _do_ of course realize a BTC can be divided to a 100 million-th, right ?
And if so, then what's your point exactly ?
Its the upper bound of what is possible, Imagine what the price of gold would be if there could only be 4582 people with 4582 ounces....... or 21 million ounces ever.
There is no upper bound to what's possible as long as you can divide BTCs
to smaller and smaller chunks. To quote Feynmann, "there's plenty of room
at the bottom".
And as a matter of fact, the current limit to chopping up BTC to 10^-8 can
easily be extended further (to put that in the context of your broken gold
analogy, image what you could do with gold if each atom could be split further
and further, to 10th, 100th, 1000th, etc ... of an atom ?)
Sure, the initial BTC holders would become rich, but then who gives a rat's
ass about that, as long as the currency delivers on allowing people to instantly
exchange value without centralized control.
As a currency your right it makes no differences as your exposure to the market is directly proportional to how long you hold on to your coin, If you don't hold it to long you are exposed to little risk and it functions as a currency regardless of price, This is why it cant die no matter what craziness the speculation causes. As a store of value or investment it makes a huge difference as scarcity as relates to supply and demand is a well know economic theory. But here is the key difference. MARKET PENETRATION. Gold has been around for billions years, any one who wants something fungible and scarce is well aware of it. Bitcoin on the other hand has been around for a much shorter time period, and as far as any real market penetration goes it does not even exist yet, we are a minority of such a small proportion.
So then the question then is only will it grow Even at a tiny pace. Well yes it must as once you learn about bit coin you cannot forget. If you look at the marketing strategy for bit coin it tends to pull you in no matter what then self replicate. For example a merchant starts to accept it, then they will advertise this, Ever small companies will have a few thousand customers. If only a tiny fraction sees the payment option and decides to participate on and on goes the chain. So it targets both sides of the coin so to speak, the hubs (merchants) and nodes (consumers). Think about all the free advertising VISA gets as a payment method. This was key to its success. Once BitCoin becomes a competitive advantage on a cost basis the adoption rate will force participation on a exponential scale. All this in return brings in all sorts of, Service Providers, Consumers, Merchants, investment capital, Speculators, Minners, Scalpers, Market Makers, Idiots, Gamblers, Gold Bugs, Day Traders, Programmers and small start-ups. There is really a little something for everyone and it all just keeps feeding back on itself like holding a microphone to a speaker.
Whats really going to be insane is when we hit the knee of the growth curve.