Well, the most important thing i can think of is the use case meaning do people actually use the token for its utility, or is that just hype. The more utility the token has, the more likely it's going to last for years because people get used to things, and it's hard to change people when they're used to this one coin. I'm looking at the top gaming studio tokens and a few low market cap ones like: $ENGN for their ability to implement blockchain onto projects without having to rewrite the whole base code plus their own marketplace, new video game around the corner, and lots of more stuff. $LFI is also one that redefines what gambling projects are. Instead of having to let the house always have the edge, you can bet on the house with $LFI, which gives out annual rewards, plus every time the house gets a cut, you get a cut. I can see these two stay for at least years to come.