Because the growth is exponential. Also the energy required for mining is growing exponentially. Something that grows exponentially (be it bacteria, bitcoin, human population, or something else) can not grow forever.
I believe POW (Proof of Work) algorithms will be replaced in the future with much much more sustainable POS (Proof of Stake). However Bitcoin must crash before that (just a matter of time).
Why would you say that?
Because the growth is exponential. Also the energy required for mining is growing exponentially. Something that grows exponentially (be it bacteria, bitcoin, human population, or something else) can not grow forever.
I believe POW (Proof of Work) algorithms will be replaced in the future with much much more sustainable POS (Proof of Stake). However Bitcoin must crash before that (just a matter of time).