My personal answer is that there will be no such situation with ddos. This is related to the concept of the blockchain itself: the blockchain locks/confirms the content of the previous block by the appearance of the block afterwards. These content can be individual declarations or transactional information, when you can quickly increase the area. In order to make a high-frequency transaction confirmation, you are the blockchain itself. You have exceeded 50% of your computing power. You said that bitcoin from around the world is all you can - as long as you can do it quickly. . Step back 100 million. Assuming you did it, now you are in a dilemma: You are a blockchain and you want to attack the blockchain.