Quote from: Demonizer on December 17, 2017, 11:44:57 PM

Hi, first of all I got a simple question.
Im running bitcoincore on a centos server with 1gb ram, which is downloading the blockchain in prune mode really slow (now it's at 338k and downloads 10 blocks a minute....),
can I download the blockchain on my computer and import it to the core even if it's in prune mode?

You can, but that would be slower.

Quote from: Demonizer on December 17, 2017, 11:44:57 PM

(download 600mb in prune mode and upload to the server)

No. Bitcoin Core needs to process all the blocks from the past so it can build the UTXO.

Quote from: Demonizer on December 17, 2017, 11:44:57 PM

I see that forks are made if 51% of nodes give the consensus,

That is not correct.

Quote from: Demonizer on December 17, 2017, 11:44:57 PM

but if you make 1kk (1'000'000) virtual machines with bitcoin core, and those are the 51% You could actually submit a bip and get it verified instantly

That is not how the BIP process works. Nodes don't get to vote on BIP. They can accept a change, or they can refuse to accept a change, but they can't choose which changes the other nodes choose to accept.

Quote from: Demonizer on December 17, 2017, 11:44:57 PM

leading the possibility to adopt a new change that could affect and steal everyone's bitcoins or make an actual change that everyone pays a default fee to the attacker's address?

Nope. Can't happen unless an overwhelming number of acutal users (merchants, miners, wallet creators, etc) all choose to accept the change.