The world population has been increasing by between 1.05% and 2.2% per year over the past 50 years[0]. Remember also that faith in cryptocurrency operates in the same way as the spread of infectious diseases[1], so some previously infected hosts can lose immunity over time and become reinfected.

[0] https://ourworldindata.org/world-population-growth

[1] https://www.theguardian.com/technology/2018/apr/10/bitcoin-s...