A single unconfirmed transaction is moving 52.82 BTC across the network. It is not yet in a block and can be replaced.
According to SENTINEL event ux_h0tnnh (source mempool.space): 52.82 BTC ENTERED THE MEMPOOL. Verify: https://mining.sentinelbtc.com/api/v1/events/unusual/ux_h0tnnh