Yes, you can. f(x) Wallet supports Bitcoin, Ethereum, and Function X networks. As long as it is the decentralized wallets of the supported blockchain network, you can import into f(x) Wallet. Currently you can store BTC, ETH, FX, NPXS and all the ERC-20 tokens in f(x)Wallet. f(x) Wallet will continue integrating and supporting more blockchain networks.
To import your assets to f(x) Wallet from other wallets, just look for the 12 or 24 word recovery phrase or mnemonic in the settings menu of your current wallet and then use that same 12 or 24 word phrase to sign into f(x) Wallet .