It is enabling coins within a fixed supply of 21M - this is not the same as creating new coins with no upper bounds. It isn't my intention to debate terminology - as I said "whatever you call it, the point is..."
>Isn't anyone holding the currency incentivized to do the same? What does "at the top" matter?
Those with more wealth to lose are disproportionately incentivised to protect it, and those with more wealth are also disproportionately empowered to take action to protect it. I used the term "at the top" to allude to the original point about what geometric shape a reasonable person would be likely to use to pictorially represent such a scheme.