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Apple, currently $814bn market cap. Google about $650bn.

If bitcoin hits 28304.69 and the altcoin shares and price action stays the same the total market cap will be at $1 trillion USD... so far bitcoin and alt coin growth has been exponential... they real cap is going to be just how much of market activity we capture as a community. ... looking at the trend so far 28k before the turn of the decade is very possible.