A single unconfirmed transaction is moving 52.18 BTC across the network. It is not yet in a block and can be replaced.
According to SENTINEL event ux_cmzb9k (source mempool.space): 52.18 BTC ENTERED THE MEMPOOL. Verify: https://www.sentinelbtc.com/api/v1/events/unusual/ux_cmzb9k