Leading cryptocurrencies plunged lower Tuesday as traders remained cautious on fears about a shrinking market in the summer months. What Happened: Bitcoin fell into the $64,000 zone for the first time in more than 30 days. The world’s largest digital currency was down 2.5% over the month. Ethereum dipped below $3,500 during the trading hours. In the past 24 hours, 125,148 traders were liquidated, with the the total liquidations coming in at $323.09 million. About $260 million in long bets was wiped out of the market. That said, Open Interest in futures contracts showed a spike. Bitcoin’s OI ro…