Growing uncertainty around the result of next week's U.S. presidential election could be pushing crypto lower just days after bitcoin (BTC) came within a few dollars of hitting a new record high. Bitcoin has slumped 1.9% in the last 24 hours and is currently trading at $70,600. Meanwhile, the CoinDesk 20 — an index of the 20 largest cryptocurrencies by market capitalization except for stablecoins and exchange coins — is down 3.9% over the same time frame, led by ether (ETH) .