>The demand for a free replicated database is virtually infinite. Space on blockchain would not be abundant at any blocksize.
but "blockchain" is not (only) bitcoin's blockchain, anyone can make one and can validate and replicate it with any group of collaborators or adversaries.
I can't understand the second point, it would help me if you could explain what you mean for a simple person like me :)
Bitcoin has mining centralization problem due to following phenomena, bigger blocks increase it further & will kill bitcoin in long-term:
1. The median propagation time is comparable for various locations[0] & mostly a factor of blocksize. Article[1]. Or you could watch the scaling bitcoin conference videos on youtube.
> but "blockchain" is not (only) bitcoin's blockchain, anyone can make one and can validate and replicate it with any group of collaborators or adversaries.
This is a misunderstanding. Yes, anyone can launch any blockchain, but those blockchains would not be secure from attack and are thus untrustable. The "only" blockchain that can be trusted is bitcoins and that's precisely the point, there can be only one winner due to network effects as size of the network is where the security of the network comes from.
A blockchains primary feature is decentralized trustless transactions and that only works when the network is large enough that no single player or group of players can control more than half the network. There is quite literally no point in using any blockchain other than bitcoins as it's the only one with enough scale for the trust to exist.
but "blockchain" is not (only) bitcoin's blockchain, anyone can make one and can validate and replicate it with any group of collaborators or adversaries.
I can't understand the second point, it would help me if you could explain what you mean for a simple person like me :)