A single unconfirmed transaction is moving 194.45 BTC across the network. It is not yet in a block and can be replaced.
According to SENTINEL event ux_1kwnvzs (source mempool.space): 194.45 BTC ENTERED THE MEMPOOL. Verify: https://sentinelbtc.com/api/v1/events/unusual/ux_1kwnvzs