According to CryptoQuant, 14,666 bitcoin (BTC-USD) - $806M worth at prevailing prices - were moved off of Coinbase's Coinbase Pro platform in a small series of transactions today.It could be nothing more than an internal transfer at Coinbase (COIN), or it could be a large investor having just made a large purchase and now pulling its coins into a private wallet(s).The news comes amid some pretty meh action in the crypto world, with bitcoin having slid to under $54K earlier today from above $58K 48 hours earlier. The current price is just above $55K.This afternoon, SA contributor J.G. Collins suggested central bank digital currencies might mark the end for bitcoin.