Ok you have control > 50% you add 1000 bitcoin to new address and release the block you won race now how network will react to new chain whit additional 1000 bitcoin in only your chain ?
It will be rejected since it doesn't follow the protocols of the bitcoin network. The attacker has effectively forked the chain and created an altcoin at that point.
You can ignore Anonymint, he's a troll spreading FUD in order to pump his own altcoin.
I thought he was just trolling how bitcoin will fail. Not that he has a better "idea" !