if you are not trading, but bought and are holding, I would advise you to simply buy a reliable coin for 30-50 dollars (you can also buy less) every month, and thus build your portfolio

Survey just for curiosity:

1) What is the best minimum amount to invest?
2) What is the maximum amount to start with?

Well, like: I would try to invest $20, but if you are a beginner, then more than 500$ is not worth it (for example)

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