This holds true only if humanity stagnates in the future. History disagrees with this assumption. While struggle and prosperity are cyclical, society and humanity develops over the centuries. Things have improved in most ways since the Industrial Revolution, even more since the dawn of the dark ages, and even more than the beginning of the Bronze Age. So we can assume our descendants will have it better than us, maybe not in 5 or 10 generations down the line, but in 50-100 generations. Then Bitcoin might have failed not because had rotted from the inside, but because something better came out of it and replaced it (and I’m talking about some other shitcoin ofc).