I love McAfee for this reason. Yes, the reason of thinking similar. 2020 may not be a year where we will see one million dollars for one bitcoin but it may not later than 2023. By 2023, the mining rewards will go less than 4 bitcoins per block and demand for new bitcoins will rise up in exponential. This supply and demand may meet in millions. I am always preferring to think in extravaganza way hence my speculation about bitcoins before 2040 would be one billion. Do not ask me for calculations as demand from world wide people is always beyond any analysis.