Beware of catching a falling knife. Although GTHX has fallen dramatically, I wouldn't buy in yet. As a dividend income invester, I would avoid the company as it is not paying dividend. However if the stock were to fall 3 days consecutively, I may trade this counter as a day trader.
I'm still bullish with this stock. China's supply comes online? Disruption of supply chain occurs each time China has a military drill around Taiwan. Besides, just wait for the next pandemic and this stock will sky-rocket again.