Bitcoin is currently appraising its value over time because of its supply is also diminishing. It means that the more demand of bitcoin, the higher its price will become but it does not mean you are to risk your personal assets in your house and sell it just to bought some. Remember, Bitcoin is not the only digital currency in this era. You just need to study and learn about cryptocurrency and you'll be able to know trade about digital currencies. There have been some big ups and that means there will be some big downs coming as well.
Due to the recent big moves a lot of new investors are expecting similar moves to happen in the short term. I don't believe that will happen but I am confident if you take a multi-year view of your investment you will win.