Bitcoin and Ethereum have not had a calm trend in the past few days— the fluctuations during the holiday period hide secrets. On the surface, liquidity is thin, and coin prices fluctuate back and forth at key positions, but the deeper signals cannot be ignored: large investors on-chain have already started to act, quietly accumulating positions. More importantly, the massive contracts in the Bitcoin options market are about to expire. This means that beneath the seemingly stable surface of the market, there are actually turbulent undercurrents. Once the market opens after the holiday, there is a high possibility of a concentrated explosion in volatility. Investors need to be well prepared.