Deep-pocketed Bitcoin (BTC) traders are suddenly moving billions of dollars worth of the flagship digital asset to and from crypto exchanges and unknown wallets.

New data from whale-surveying platform Whale Alert reveals that one BTC whale abruptly moved 35,049 BTC worth $1,518,020,170 from an unknown wallet to another on January 31st, the biggest transaction involving the crypto king on the day.

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Other notable transactions on Whale Alert’s radar involving the top crypto asset by market cap on that same day include:

The total amount of Bitcoin moved by high-net-worth investors yesterday comes out to about $4.5 billion.

Bitcoin is trading for $42,647 at time of writing, a 2 decrease during the last 24 hours and a 12 decrease from its 30-day high of $48,494 set on January 11th.