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You are absolutely correct, in any business or Investment in life one should always set a target or goal before any other thing but setting a goal and target sometimes is not what matters the most rather what matters the most is you working persistently and very hard to achieve that goal or target.
We should set some goals that are within the realm of attainability, but they do not need to be specifically known to be attainable, but to give us a direction, so the further out the goal the more difficult to be specific.
In regards to bitcoin, let's say that a guy is fairly young (maybe starting out career and mid-20s) and maybe attended some university and/or trade schools and so is fairly early in his career.. maybe he is starting out with an income of $25k but with promotions and cost of living adjustments, he expects to be earning $50k to $60k in 8-10 years, and so he might consider that if he invests in bitcoin for 8-10 years, he might be able to retire in 15-20 years... and perhaps sooner, but he is going to start by putting 15% to 25% of his income into bitcoin, and he will also build up his emergency funds and also his reserve funds.. which he is already working towards such goals that involve weekly buying of bitcoin and maybe adjusting it to make sure that he is not going beyond his discretionary income... and so every few years, he might tweak his goals and/or verify if he still might be aiming to reach his goals.. and he could maybe make adjustments to his goals or his timeline as needed, even though he continues to make progress within parameters that he had already set earlier.
I believe everyone in this world has dream, target, goal etc but some are unable to get it and the reason behind this is because they are not consistent, they are not working towards it though some are working but they are not working harder because at some point you need to stretch yourself because nothing is easy so we should try as much as possible to work hard after setting and defining our goal.
With the passage of years guys can run across obstacles or even competing goals, and even a young guy might be meeting girls and considering entering a relationship, yet there could be compatibility questions that he is trying to figure out, but that the girls that he meets might have some influences on his finances and his activities and even discussing some goal setting matters that he may or may not share all of his goals, including all of his bitcoin-related goals. How much to share is not completely going to be known in advance, so there could be some challenges and even job changes or even location changes that were not known in advance.