I can't speak for everyone here if we can still believe in crypto but I would say the price has nothing changed in a bad way for the technologie, it's even better now. 
Yes I truly believe in cryptocurrency. We all know that the basic aim of everyone for participating in any investment market is to earn profits and there is nothing wrong in that. But a person should have some realistic goals. You can invest in something blindly and then expect your money to be doubled in a week. You should research and study properly and take every decision wisely.
Ofcourse! It's always important to research and don't invest blindly in every shitcoin. Lots of shitcoins will become very low value or near 0$ value and owning them can result in a complete loss. Realistic goals are always to support!