A single unconfirmed transaction is moving 1,353 BTC across the network. It is not yet in a block and can be replaced.
According to SENTINEL event ux_1q2q36i (source mempool.space): 1,353 BTC ENTERED THE MEMPOOL. Verify: https://mining.sentinelbtc.com/api/v1/events/unusual/ux_1q2q36i