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.
Actually, the reasons why they keep on buying bitcoin is its a good investment which allow the investors to gain and make huge amount of income. In addition, once you invest and prefer to use in long term investment you can earn a very huge amount of income but once the price of bitcoin goes down you can probably earn low income or you will just hold it.