As per this announcement, RIF is delisted from Bitfinex, ceasing trading on 26/03/21 at 9:00 AM UTC.
RSK Infrastructure Framework (RIF) is a token developed on the RSK platform allowing holders to consume (and interact with) services within the RIFOS framework. The RIFOS framework, also built upon RSK, is a suite of distributed protocols built to enable fast, simple and scalable development of distributed applications within a highly-scalable, secure and unified environment.
The RSK framework, in combination with the RIF token, allows developers to deploy and interact with the applications built atop the RIFOS framework. These include, amongst other things, third-party developed infrastructure services, as well as any additional applications deployed on the RSK framework.