(Reuters) – Elon Musk’s net worth dropped below $200 billion on Tuesday as investors dumped Tesla Inc shares on fears the top executive and largest shareholder of the world’s most valuable electric-vehicle maker is more preoccupied with Twitter. Musk now has a net worth of $194.8 billion, according to Forbes, with a big share of that coming from his nearly 15% stake in Tesla, which has a market value of $622 billion. The company has lost nearly half its market value and his net worth has dropped by $70 billion since he bid for Twitter in April. Tesla dips as investors worry over Musk’s attenti…