I am new to learning about Ripple. My question is that with 100 Billion potentially in circulation, how high could they potentially be valued assuming the company is successful?
It doesn't really matter if it's 21 million, 100 billion or 10 trillion as long as it can be subdivided. For instance, AFAIK each Bitcoin can be subdivided to 100 million smaller units to ensure the currency is useful for low value payments even if it value grows to, say 1000 dollar per BTC. With 100 billion XRP such subdivision is simply not necessary but appreciation of this currency is same possible.