It was

It was, but Barcelona decided in the end not to go with anybody in the crypto space.

Was Polkadot really in the race to become one of Barca's sponsors?

FC Barcelona Releases Its Cryptocurrency - Medium

Polkadot In Race To Become FC Barcelona’s Official

Polkadot could be Barcelona's new master sponsor

FC Barcelona Chooses Spotify Over Crypto Sponsors

A few weeks ago

Polkadot Could Become FC Barcelona’s Official Jersey

A few weeks ago, the news also emerged that Binance and FTX were also vying for the main space on the Barcelona shirt, but apparently, the negotiations have not

Binance in talks with FC Barcelona over sponsorship