The wallet, which remained silent for 4 years, has just moved 
BTC wallet top 7
https://bitinfocharts.com/bitcoin/address/16ZbpCEyVVdqu8VycWR8thUL2Rd9JnjzHt
BTC wallet top 7 https://bitinfocharts.com/bitcoin/address/16ZbpCEyVVdqu8VycWR8thUL2Rd9JnjzHt
Wow, this is huge and it would means someone very rich may have sold all his Bitcoins.
Do you think this is something to worry about?
