-snip- Nevertheless it is a huge amount to be flying in and out this address and it is also labeled as btc m4 14 which i googled and nothing came up.
The amount is normal for a service, exchange or pool's cold-storage wallet or even a hot wallet of a big exchange, don't just correlate any "
loaded" bitcoin address to satoshi.
The tag was probably "
grandfathered" there when Blockchain(
dot)com used to accept address tags from the owner.
AFAIK, they required a signed message to include a tag like that "
BTC M4 14" and if you're linking a website, a verification url.
For your curiosity, walletexplorer deduced that it belongs to "
wallet [0031910272]"
Which could be Coinbase (
don't ask for source).