For me BTC is a opportunity to earn not just extra money but huge money other than to my regular salary at work.
I can work at company while checking on the trend about the rate changes.
BTC is opportunity for us to success in life  investing for our future is a great deal.  When you check the previous change rate of BTC  it only show that you are in the right place to invest your money.  in fact we don't need to do any effort  even were sleeping bitcoin making money for us.