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I think you've answered your question...
solid team, problem-solving, good backing up funds, and honesty are very important to boost the success of a cryptocurrency project.
Good timing should also be considered as an important factor. In the bloody market days, we witness the failure of good projects, while in green days even shitty projects can find a place for themselves.
a phenomenon that will continue to occur, when bitcoin is bullish, many Altcoins will be affected, including shitcoins.