I believe some Big community is just using Elon Musk's bullish sentiment to move the Bitcoin market.  In every industry, a group working behind the scene always look for a possible "figurehead" to hype the market.  And at this moment it is possible that they are using Elon Musk's popularity and bullish sentiment to move the market and working in sync with whatever Elon Musk says.  So,  I don't think Bitcoin will suffer too much damage if Elon Musk changed his mind,  instead, we should be worried about the big group that is working behind the scene on when they will let the bubble burst.