geometric increase

The idea that Bitcoin will rise at the same geometric rate forever is somewhat flawed. It might do, but what is more likely is that the rate will slow, and volatility will reduce as Bitcoin's market cap. approaches the size needed to conduct the market transactions.

However we are a long way from that at the moment. Bitcoin is still a complete baby , and will either continue to grow, catastrophically die, or just slumber a while.

Trying to predict it is a fool's game. Enjoying the ride is not. The beauty is that it is still early days, and you don't need many to participate IF it matures into a significant global currency.

Whatever happens though , Bitcoin has already challenged fundamental beliefs about economics and the modern banking world.

Maybe Satoshi will win a Nobel Prize in Economics one day ...