Coin Bureau reports that 31,968 BTC (~3.78 billion USD) has just been moved after 3–5 years.

This is not necessarily seen as "long-term whales waking up" because 3–5 years ago fell into the crypto winter of 2022, meaning this Bitcoin likely belongs to holders from the 2021 cycle. However, it may indicate that some whales are starting to take profits instead of continuing to wait for higher BTC prices.