People are invested in bitcoin in many ways.
They see good reasons to stick with it and most of them are thinking long term.
Things crash from time to time, it doesnt mean they are dead.
And besides that profit isn't the main focus for most of the old dogs of bitcoin.
Yes, btc is one of the booming through investing. Now even famous investors and entrepreneurs are promoting bitcoin or standing behind bitcoin as a solution for now and into the future. That is how famous is btc.