Leading cryptocurrencies drifted sideways over the weekend as unanticipated market swings created an atmosphere of uncertainty. What Happened: Bitcoin spiked above $62,000 Sunday, ending a week that saw the King Crypto wobbling between $60,000 and $62,600. Concerns over the sale of Bitcoin by the governments of the U.S. and Germany eroded investors’ confidence. Ethereum climbed past $3,400, with speculation rife about the possible date for final approvals for spot exchange-traded funds. On a positive note, Bitcoin’s Open Interest rose 4% in the last 24 hours, marking an influx of fresh money i…