Over the years, since Bitcoin was launched, numerous cryptocurrencies have emerged. Some have grown and thrived, while others quickly went down after they were launched.
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Trends change every year. Sometimes it is very difficult to catch this speed. It's really impossible if you don't follow the market closely. While some coins become new stars, some coins disappear from our lives like a shooting star. Those who do not follow the agenda closely should keep Bitcoin and major altcoins in their portfolios. Otherwise, they may have a portfolio of shooting stars. :)