There are the so-called shit coins - sometimes i buy a small part of them, because they are pumped occasionally. But it is risky.
Best way buy the altcoins where are news expected and growth very likely. But it is big and hard job, to follow the news of many coins and their developers.
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If it is risky, Why do you always considered to use this kind of coin? When eventually there are some that has a good background where it is not risky at all.