Bitcoin struggled to hold $80,000 after falling to $79,145 on Saturday. It was down about 4% for October at the levels described, but that would be its monthly loss only if it closed near $80,000.
Markets expected the Federal Reserve to keep interest rates at 3.75%–4% at its upcoming Wednesday meeting; no decision had been made. South Korea’s KOSPI index closed down 1.5% on Monday ahead of a week of major US earnings reports and economic data.