Cryptocurrencies tumble along with global financial markets on Monday as Chinese property developer Evergrande collapses, potentially spreading to other indebted property companies as well. Bitcoin (BTC-USD) swoons 7.7% in the past 24 hours to $43.7K, while Ethereum is off by 9.2% at $3K; Binance Coin ((BNB-USD -9.4%)), Cardano ((ADA-USD -8.7%)), Ripple ((XRP-USD -12.7%)), and Solana ((SOL-USD -10.6%)) are all deep in the red. It appears the $3K level for Ether (ETH-USD) has served as solid support thus far, but still declined to its lowest point since mid-August. The trade-weighted U.S. dollar gains with the 10-year U.S. Treasury yield gapping down to 1.32%. This dynamic along with a selloff in risk assets shouldn't be surprising since the U.S. dollar still serves as the world reserve currency; historically, dollars are in demand amid risk-off events. Some stocks that act as a "proxy" to Bitcoins' (BTC-USD) price action are also plunging, including: Marathon Digital Holdings ((MARA -5.1%)),