Crypto market will always go up and down. it is left for you to always follow news to know when it will dump and when it will pump, mostly news affects the crypto market, good news makes the market to pump while bad news makes the market to dip.
As Warren Buffet famously said, be fearful when others are greedy and be greedy when others are fearful. As for me, when everyone is afraid, buy. When everyone is greedy, sell.