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Selling shouldn't be the main focus of a new investor who just started his bitcoin journey because he would be carried away with little profits and get distracted by selling. Before you kbow it, you will lose focus on your investment goal and turn into a trader limiting the opportunity that is in the market for you to keep on accumulating and building your bitcoin portfolio overtime for the future.
Investing and trading essentially have the same end goal - namely earning a return. Both have different time frames where investors tend to believe that in the long term the value of their investment will be more - while traders tend to choose the short term to generate recurring profits. Traders who are able to exploit market volatility with their knowledge and skills are more likely to be able to accumulate more assets without requiring additional capital - but this will obviously take a lot of extra time and effort as they will have to deal with the market more frequently than holders.
The focus on sales is not a problem - but it may not be suitable for investors. Even some investors sometimes need to endure temporary losses due to price volatility in order to get the expected return in the future - but investors and traders both have the same goal. It's up to them what they're interested in - the ultimate goal is still to generate returns.
At least, it's good that we put into practice some healthy long-term investment goal to enable us accumulate wealth for ourselves from the current resources that we are having now. Four years is cool for those that can't be patient and hodli for long, but I prefer from 10 years and above because that's is where the real profit lies based on the compounding effect of your bitcoin stash.
Some investors only need 3 or 4 months to make 100% returns on their investments - others need 24 months to make 600% returns. This all depends on what each of them's goals are and to what limits they are able to withstand. It's wise to sell when someone takes a profit if the value of their investment has already reached 200% to 500% - but it's also not wrong to take it early at 100%. It's just that we definitely know that they will regret it when they find out they should have earned 500% or above.