We do not know if bitcoin will truly exceed 30000$ at the end of the year 2020. Some of the experts say that at the end of the year 2020 the price of bitcoin might reach the price of 100,000$ and maybe it is possible if there will be a big pump after or before th bitcoin halving.
All the experts who predict bitcoin price are con artist, they come up with random price valuation and then claim that i said so when the price reaches those valuation, no one can predict when a predicted price would reach and if that cannot be predicted exactly what is the point in these prediction, i consider these as vague attention seeking trolls. If you look in the market the price of bitcoin already steps down at the price of 7800$+ so do you think we really have a happy ending on this year 2019? or do we really have another bear at the end of this year?
For happy ending you have to search somewhere else 
. If you cannot predict what the market could be tomorrow how come anyone could predict the price at the end of the year 
.