RMRK has been voted in by the community to become a sufficient asset on Statemine.
As a reminder, Statemine is a common-good parachain which does not have to participate in Polkadot’s chain auction model, and instead occupies a permanent slot connected to the relay chain. Its purpose is to be a lightweight balance-keeping ledger of basic fungible and non fungible tokens.
To be able to receive and send tokens on Statemine, accounts need to be initialized with some KSM - Kusama’s native token - and use KSM for transaction fees. This is to prevent spam on the chain.
As RMRK is now sufficient, it is no longer necessary to pay transaction fees in KSM or have KSM deposits in accounts to use the RMRK token on Statemine. This makes integration with centralized exchanges much simpler, and enables use cases such as trading and minting NFTs using RMRK as a currency, directly on the chain level.
Therefore, the token migration from Statemine to Karura and other chains is now canceled: there is no longer a time limit for extracting RMRK out of Statemine, and the tokens can be left there indefinitely.
Up to date information about the token is always available on the Singular tokens page.