you chose the wrong people to listen to their opinions, many of them making crazy statements in order to gain more media momentum.
OP just wants to get some free traffic to his site, and you know that most people are only interested in big numbers. People like to live in hope, no matter how unrealistic it is, and even more, they love to see when one gathers such speculation in one place. I see OP is also adding Tim Draper on the list, but his speculation is for 2022/23, and he is one of the few whose thinking I take somewhat seriously.
Obviously, many speculators are expecting a big boom in the coming years, which makes some sense considering halving 2020. But could that be the only reason to see Bitcoin at $50k or $ 100 000k? Of course not, I believe that many of them are counting on other things, such as the first BTC ETF approved by SEC.