A single unconfirmed transaction is moving 77.61 BTC across the network. It is not yet in a block and can be replaced.
According to SENTINEL event ux_4xfkli (source mempool.space): 77.61 BTC ENTERED THE MEMPOOL. Verify: https://mining.sentinelbtc.com/api/v1/events/unusual/ux_4xfkli