A single unconfirmed transaction is moving 329.82 BTC across the network. It is not yet in a block and can be replaced.
According to SENTINEL event ux_c4p6f8 (source mempool.space): 329.82 BTC ENTERED THE MEMPOOL. Verify: https://sentinelbtc.com/api/v1/events/unusual/ux_c4p6f8