Suppose I make a locked wallet with 50000 pre-generated addresses.
As long as I researched, only way I can collect those 50000 addresses using RPC and "getnewaddress". Feel free to correct me.
I understand this will took several hours or days, so I can set this up on some VPS and let it run.
For this I do not need blockchain to be synchronized.
How can I start bitcoind without blockchain synchronization?
I am thinking about "connect" option or testnet, but both looks like a hack.