Can we expect Bitcoin and other types of coins to have good prices at the end of this year because 2018 will end. I'm starting to worry that next year will experience the same thing 
No one knows what can happen before the year ends. Crypto currency market is full of surprise, who knows if the market will be stable by the end of the year or will prices go up somehow. But, do not expect anything, just wait and be patient. Let's just hope something good will happen.