Bitcoin is currently under a practical DoS (Denial of Service) attack.
I say practical because service (transactions) is not technically being denied, it's just expensive right now. Someone is spamming transactions in the mempool, causing fees to be expensive, effectively pushing small fee transactions back in priority.
As a miner, I enjoy this as fees are jacked. As a user of bitcoin, this simply means layer 1 transactions are expensive right now and will eventually go back down to normal.