The notion of million-dollar Bitcoin may seem damnably unrealistic, but consider that the cryptocurrency that was trading for pennies in 2009 has now soared to almost $1000 USD. From a dollar to a thousand dollars is a 1000% rise. From a thousand dollars (its current price) to 1 million dollars is also a 1000% rise. Bitcoin has a proven track record of this magnitude of appreciation.
From a dollar to a thousand dollars is not a 1000% rise, it is a 1000x rise (more like a 100,000% rise)
The problem with that analogy is that you are ignoring the base effect. In percentage terms, it is very easy to increase by a large percentage when the initial value is small. There will be hundreds of alt coins which would have increased by the same percentage. But as the market capitalization grows, repeating the increase becomes very difficult.
