It seems like the russian affiliated hacker group Killnet initiated a DDoS attack against most banks in Denmark last day, meaning that their websites went down for a period of time and people were not able to access their NetBank (bank accounts through their websites).

This got me thinking about Bitcoin and if there are any similar risks to a DDoS attack. Overflooding the pool of transactions could be one such attack - we have seen similar cases during bear markets where the pool just got completely filled and you would have to pay double digit sats to make a transaction. Attacking the Bitcoin network like this is not costless, but on the other hand, at its current price, it would be to expensive to spam the network with transactions.

Then there is the lightning network, which my guess would be, is a lot more difficult to attack because the attacker would need to target multiple lightning nodes. As the network is growing and the channels between them increases, this is just making it even more difficult.

I would love to hear your take on it, and understand if my reasoning is flawed.