Tesla CEO Elon Musk shares long term investing advice; Here's what he said

<ul><li>The world's richest man wrote he has been asked a lot about how to invest and which companies should one invest in.</li></ul>

Elon Musk buys 9.2 % stake in Twitter for nearly $3 billion to become top shareholder; Here's what this means 

Twitter shares surged 25 percent soon after the Tesla boss bought a stake in it