Tron is the first name which comes to my mind as it has always been disappointment for me though I had given multiple chances but it failed miserably. It's better to go BNB and other top coin instead of Tron as the dev team is least bothered about further enhancement
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TRX and XRP for me, not for long-term investments because their platforms are shrouded by uncertainty.
But don't get me wrong, I like both of these alts when it comes to transfer purposes because they are cheap.
Their availability in most trading platforms is also a very good choice when it comes to transfer and trading purposes.
However, because of SEC issues and all, it is hard to consider them for long-term holding.
You can't guarantee that when you forget that you have these alts for years, they will be here and increasing its value.