I seriously doubt there is a decent altcoin. Any reason that someone will provide in order to follow and buy into a project, is looking like advertisement that has no foundation.
I can't find anything solid that makes me want to follow an altcoin. Between 30,000 cryptocurrencies I don't see something that will surprise and evolve into a major player.
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This mindset is also what most people used to do when bitcoin first appeared. Many people underestimate, but who would have thought bitcoin becomes very valuable at this time. So, don't underestimate, don't the top-ranked altcoins have cheap prices first?
All have time, therefore there is an analysis with the help of indicators on charts, news and rumours that come alive. If indeed at any given moment there is a good chance of altcoin, then take advantage, if not then choose a safe way, for example choosing stable coins for a while, or bitcoin if there is a good opportunity too. This decision all depends on whether for the short or long term.