Bitcoin, Ethereum, and Ripple experience a market sell-off and fall below crucial support levels.Bitcoin struggles to maintain its current level, entering below the oversold territory on the RSI.Ethereum loses 11% of its accumulated gains in the past week and faces rejection from the 50-neutral territory on the RSI.Ripple shows resilience with a positive 55% return on its 90-day chart, but remains in the oversold territory on the RSI.