A single unconfirmed transaction is moving 63 BTC across the network. It is not yet in a block and can be replaced.
According to SENTINEL event ux_1j2lq6w (source mempool.space): 63 BTC ENTERED THE MEMPOOL. Verify: https://www.sentinelbtc.com/api/v1/events/unusual/ux_1j2lq6w