In one scenario, if one miner captures 51% of the hashrate, the value of the entire network drops to zero, and all of the miner's devices become junk. Therefore, no miner wants to capture 51% of the hashrate.

Increasing the size limit or decreasing block times for scaling increases the blockchain size and eliminates small miners.

Reply to this note

Please Login to reply.

Discussion

It’s all dynamic variables. You've got shifting motivations, shifting rewards, shifting costs, shifting mechanisms, shifting code, shifting hardware. A lot of these "if X doesn't happen by Y then we get Z" arguments are nonsensical, because they assume every other variable is static.