It's always better to trust your own analysis than to believe any of the bitcoin prophets & their prophecies. These people just give their blind estimates to fool people around & play with their money. Technical Analysis can never predict movement as big as $80000. Moreover a person who has actually given a statement based on technical analysis would always love to share it to take others opinion for a better understanding & even improving it in whole. So that he can correct the deficiencies.
It seems you are advising people to learn TA . Well actually that is a good suggestion and do not forget to know FA too, it is very important. But there are inside intels that is not available to us "outsiders". Many of these so-called "experts" have a wide range of connection and groups that have the capability to affect the price of Bitcoin. Aside from their own influence, their connection has their own influence too, so once they conspire, we can see the movement favors their predictions.
It is true there are many people with influences that have access to information and knowledge that we do not, but we do not really need that knowledge to make some predictions about the future of bitcoin, bitcoin is so good that it is almost inevitable that is going to have success, the governments cannot shut it down and it is one of the best forms of money available and when we take into account its limited nature then the price has almost no option but to go up over the long term.