Leading cryptocurrencies plunged Sunday as September started on a weak note for the volatile asset class. What Happened: Bitcoin slid below $58,000 for the first time in over two weeks, while Ethereum hit a three-week low of $2,400. Bitcoin lost nearly 11% in August, worse than its average of 1.75% gains for the month, according to Coinglass. The total cryptocurrency liquidations in the market hit $165 million in the last 24 hours, with $140 million in longs getting evaporated. Bitcoin’s Open Interest dipped 1.9% in the last 24 hours, while funds locked in Ethereum’s futures contracts dropped …