The bubble will burst sooner or later, at some point nobody will want BTC.

subprime mortgage loans seemed to be safe at that time,
if they can't pay back, banks will just sell their home
that's why banks gave loans to virtually everyone. But you know what happened in 2008.

BTC is backed by very weak concept mining,
mining itself isn't strong enough to justify current BTC price.
 

BTC, only early adoptors were rewarded, and they are the ones creating bubbles,
they don't care what happens to you, they already cashed enough money,
so what they can do is sustain their position by creating bigger bubble.