By David Randall NEW YORK (Reuters) – With a stable of businesses ranging from electric cars to private rocket ships, iconoclastic billionaire Elon Musk has become the richest person in the world by building a fortune firmly planted in 21st century technology. With an all-cash $43 billion offer to buy Twitter Inc, Musk may soon emulate the tycoons of the past by controlling a media platform that contributed to his rise to fame. Musk, the chief executive of electric car maker Tesla, revealed the takeover bid in a regulatory filing made public on Thursday and said he would take Twitter private. …

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