I think you are missing the point here. The point is not whether 1 BTC is worth $40,000 or $1M, the point is: is it a useful trechnology that is going to revolucionaze the world of finance as we know it?
Right now, BTC has taken a dip, nothing we haven't seen before. It'll most probably recover from here and go to another ATH soon.
But even if it stays at this level or goes even lower, the fact remains that Bitcoin is a very useful technology that is going to change the world as we know it.
Bitcoin and crypto provide a solution to many unsolved problems for humanity. Among other things is a safe reliable way to store value and that a huge deal for billions of people in developing countries.
A decentralized currency that is not backed by any central bank is a very elegant solution for some of the problems money has. It's transparent, uncensorable, inmutable and autonomous. It provides many opportunities for individuals and institutions. The price is just frost in the cake.
Do yourself a favour and read the white paper, if that doesn't convince you, nothing will.
Don't be like those who made fun of the internet in the 90s calling it a useless technology.