It is also not always easy to know what we know and know what we do not know, and some times it can take thousands of hours to learn about a certain subject, and sometimes people need some very basic skills and experiences to even be able to relate to certain topics, and so there could be some topics in which we are either early in our learning or we are struggling to understand certain aspects of the topic, so we may well be more dependent upon the observations of others, than to form our own opinion.. and whether we have time to study that area or whether our time is well spent to study certain topics can be questions of judgement including that we might not be able to have strong opinions in areas in which we are struggling to understand that topic.
A person who spends thousands of hours learning something is much more likely to succeed if they study with focus. Most of the times we notice that people do everything just for entertainment, but they don't try to learn something that will change their life. If every person works with bitcoin or any other technology then it will be very easy for him to improve.
Now we cannot accept everyone's advice but we have to try. We must study so that we can use our time properly. If you don't study, you will never know how things actually happen. And studying for all these subjects is very important.