Executives keep selling stock. The company is nowhere near profitability.Nikola (NKLA -6.74%) -- yes, this company is still publicly traded -- slipped over 20% yet again this week, according to data from S&P Global Market Intelligence. The hydrogen-electric truck start-up keeps inflating its shares outstanding, insiders keep selling, and the company is nowhere near close to generating a profit. No wonder the stock is down over 99% from all-time highs.The stock keeps falling, and it only has further to go, b ...