According to @CryptoMichNL, altcoins suffered sharply in 2019 as BTC stalled in Q4 and sentiment declared alts dead, yet a 12–18 month reversal followed that changed his results, guiding his current approach (source: @CryptoMichNL). He states his altcoin portfolio is down about 70% now, but he is holding spot and avoiding leverage based on the prior 70–80% drawdown experience that later recovered, emphasizing patience and positioning (source: @CryptoMichNL). He adds that social sentiment can flip day to night and altcoins can erase six months of losses in under two weeks, reinforcing the need to be positioned before momentum returns (source: @CryptoMichNL). He concludes this cycle appears longer than previous ones and he prioritizes patience, risk control, and avoiding leverage while waiting for potential altcoin rebound, using the 2019–2020 template with BTC (BTC) as context (source: @CryptoMichNL).