Coinbase Ventures also joined the round. : Bitcoin self-storage startup Casa has raised $4 million in a seed round led by Fidelity Investments’ blockchain-focused Avon Ventures. The investment comes with a board seat for Avon partner Sachin Patodia, Casa CEO Nick Neuman told CoinDesk. Tioga Capital, Castle Island, Cadenza, Champion Hill, Compound VC, Precursor, Lerer Hippeau and Coinbase Ventures also participated in the round. Casa will put the funding toward improving the reach of its self-custody bitcoin wallet, anchoring a broader push to woo more users after a year of steady growth.