The price changes after one year because miners actually start to feel the pain of having half of what they use to make. Right now they are making so much money that eventually they will start to run out of extra money they have and they will want extra money, in order to make that extra money they will stop selling for cheap and that will cause the price to go up.
Right now, they are making a ton of money and only cashing out a bit to pay for stuff, they are not cashing out all of their coins, which means they have a lot of money saved aside for days like these, they know eventually stuff like this will happen and difficulty will change and some big whales will stand whereas small time miners will lose a bunch which is why it is definitely not gonna go up right away.
I definitely do not believe in the price of Bitcoin more than $ 20,000. after the coin fell below 4000 dollars. I think that for a long time we will not see Bitcoin at $ 20,000.
As much I dont want to believe it too, but all of these analysis is just mere predictions, plus Bitcoin's price movements are very unpredictable. It could be pumped by the whales, but there were also a lot of investors whos waiting for the price to climb back to the ATH and sell everything hoping to harvest good returns. Therefore the price will eventually crawl back below $20k due to massive selling.
Now, we have to realize the importance of positive TA's because it will encourage more investors to buy more Bitcoin.