Grayscale files for Polkadot and Cardano ETFs following earlier 19b-4 moves Grayscale filed S-1s for Polkadot and Cardano ETFs, expanding its altcoin lineup after earlier 19b-4 filings with Nasdaq and NYSE Arca. The post Grayscale files for Polkadot and Cardano ETFs following earlier 19b-4 moves appeared first on Crypto Briefing. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Filed under: Bitcoin - @ August 29, 2025 9:24 pm