Well, I think that such claims come from the analysis that the people made out of the past charts or movements of bitcoins which may be reliable but not that much. But to be honest, I too believe that this might really be the last year that we might see the prices of bitcoins being lower than 10,000. That is, if what happened in the past still happens this year..
We have heard that many times before, saying that this will be the last time we are going to see bitcoin at $10K. However, we are even struggling to go past $8K now. So much volatility in the market that no one can really predict where the price will go.
Perhaps the reason that they are really saying that this year is the last time we are going to see it going below 4 digit mark is that they are bag holders and they want to influence the market and obviously their portfolio to grow.