One way to reduce harm from DDOS is to host the content with decentralized protocol e.g. ipfs and link the images or even the entire website through public gate

One way to reduce harm from DDOS is to host the content with decentralized protocol e.g. ipfs and link the images or even the entire website through public gateway. That's not ideal as it just shifts the problem to the gateway. Maybe NDN (named data network) could help if more routers support that.