The scammy OP_RETURNs have nothing to do with the 80k move, one was even served to 1CounterpartyXXXXXXXXXXXXXXXUWLpVr which is an address well known for being impossible compitationally for anybody to have its private key.

As for the link to $GIGANT, this I don't know bit seems unlikely.

The only one solid information on the 80k move is its timing on 4th july. Could indicate a patriotic US owner, perhaps someone supportive of the BTC reserve.