If Raiden Network will deliver the promised features it will likely achieve success. But not having read the whitepaper I fail to understand what the token will in fact do and why it would become more valuable in time. By the way, is it traded already somewhere? I understand there has been already an ICO.
At binance you can buy.
Something close like a whitepaper
https://github.com/raiden-network/spec/blob/master/readme.MDIf don't keep full node -> you run light client and you pay in RDN for Monitoring Service & Path Finding Service
In future will be more usecases. ( something like stacking in generalized state channels )