Agree will be better if you don't follow 100% signals even though you hear that from a trusted trader, you should use it as a comparison or reference to your own analysis, if your analysis is the same as the signal then you can use it..
Good idea indeed. If you keep your own analysis and also the analysis from the people who call themselves as "gurus" you will be able to project them for future and watch what happens. You will be able to follow up and keep track of the movements and which predictions actually came out correctly and which did not. This should give you an idea about which person is actually giving good advice and who is a shill of some shitcoin.
They dont need to be 100% correct because no analyst would be able to do that. But a close approximate is good enough.