I would probably try to manipulate the market for a living 
for all those answer above , this is what made my day completely Yeah why not? 100 billion meaning 10% of the totality in this market is yours ? Damn no wonder how many times you can move the price of Bitcoin Up and down with that amount?
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But me having that huge capital ? i will Invest and build Casino's in some strategic places to generate faster income so that 2 years target to gain another 100 billion will be in time.