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I hold 30 different coins with great potential in the next two years. But the only coins I am currently planning to hold for 5+ years are STEEM, BCH, Bitshares and Digibyte.
But I suggest you don't follow anybodys' investment decisions without doing your own due diligence.
Longterm is a vague term in the cryptosphere, because things can change very rapidly. I monitor my coins at least once a week.