Besides how can you break the internet physically or cyber. Because you need to DDOS or DOS all internet to get it offline and some parts of servers are protected by police physically so both are not possible.
Https isn't safe, it merely means only trusted companies can decrypt them, ie your service provider. At least it doesn't work the way you would think it would work to truly be secure, as in only your target destination would be able to see what you sent them.
No technically it is possible. Impossible != unlikely. There just isn't much use to it. What gain does anyone have from essentially taking down the Internet? It would be an absurd amount of work, coordination between many people, and money for no benefit other than some fame I guess. And then jail for a very long time.