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Of course Before one will think of going for long term investment first you will need to examine yourself very well before you will think of making any investment plans. Because the journey is very far, moreover this journey is not the one you will go and succeed just within a couple of months No" rather it will take some years before it will yield a good profit, except you don't intend to get enough profit from your investment. That's when you can decide either to cut the journey off or you will proceed in getting to the final destination.
Think more simply if you want to start investing in Bitcoin in the long term, such as not having to think about profits immediately before starting it even though everyone knows that the purpose of investing in Bitcoin is to be able to have profits when you have run it in the long term. Because from some people that I see, they tend to take a long time to start it just because they still have reasons to prepare themselves and so on even though they have sources of income that they can use for that.
So if there is indeed an intention to start investing in Bitcoin with a long-term target, I think everyone can start it as early as possible as long as they have a source of income that they can share to do so rather than thinking more which continues to waste time and not starting it until now. The advice you said does not seem bad, but for those who already have the intention and determination for it, it is very good to start it immediately without delaying by putting more reasons as obstacles.