If you got in before $0.05, then yes it's a good long hold coin. But if you buy it in $0.30+, then i can't say surely, because Currently they do not have anything in the project, it's all about speculation, and future idea, which will take years to implement. So it's like 2 or 3 years away, i wouldn't buy this coin now, as last 2 months people are dumping.
Lots of people bought it from $0.5 and $1 range. They will have to hold it in long term anyway. There is no other way around it. ADA is a good one and it's a promising project.