When Bitcoin was 20k, everyone had estimated 45-50k$ price for this year. Therefore it is difficult to predict a long-term price from regular way in crypto trade. Because the price doesn't have a regular movement and even a small move can influence the price movement.
In this article they just calculated the average prices of the prices and estimated. If it is so easy why do so many people lose money?
Literally no one knows what's going to happen aside from those who pull the strings behind the scenes. Everyone else is acting all smart while they don't know shit. We're all guessing based on the most recent sentiment and adjust our predictions afterwards when things don't connect. Price up means people expect it to go up further. Price down means people expect it to go down further.
People last year got a confidence boost with how the price kept going up what seemed to be for ever. Everyone suddenly became an expert because hey, they predicted the price to go up, which it did for months straight. The correction that followed afterwards came out of nothing for them, because they aren't used to seeing something like that happen because they were programmed to believe that the price could only go up.