Are you sure you mean $1900 or did you mean $19000? I believe you meant the second option.
First, the forecasts are not guaranteed, they are the assumptions that people make and unhappily these exaggerated optimistic assumptions have made many invest in bitcoin and when the price falls these people are complaining on the social networks. finally asking your question: I think that the price will not have big increases like last year and also will not have huge drops to the point that we reach the levels of $2000.
well, although I do not like bitcoin cash I should say that if bitcoin increases prices then altcoin cash will also increase in price as all altcoins increase in price when bitcoin increases in price