big moves like this can make people nervous, but it's probably just a routine transfer. With 10K BTC being only a small fraction of daily volume, it’s not likely to impact the market much. Keep calm and keep holding!
A big amount of coins moving to exchanges or back to wallets if a reason for nervousness, that trader should not trade, because they lack the trader's mindset. The latter needs to identify these changes but not get emotionally charged because of it.
There are so many such movements happening every few days, what do we have to do about it? Wait for the price to drop and buy it, its plain and simple. Because when you have bought at that low you have ample points to sell at having a good multiplication of the price.