According to Reuters, BlackRock (BLK), the world's biggest asset manager, on Thursday filed for a Bitcoin exchange-traded fund, ETF, that would allow investors to get exposure to the king of cryptocurrencies. The U.S. regulator has yet to approve any applications for spot bitcoin ETFs.

That’s major good news for all crypto enthusiasts since the only liquid vehicle to obtain exposure to Bitcoin as a way to diversify classic portfolios so far was Grayscale Bitcoin Trust (GBTC) with still-low daily trading volumes of around 2.25 million shares. Moreover, SEC rejected Grayscale Investment LLC’s application last year to convert its Grayscale Bitcoin Trust into a classic, i.e. more accessible and liquid ETF.

Last year, BlackRock launched a spot Bitcoin private trust for institutional clients in the U.S.

According to notes in the filing with the U.S. Securities and Exchange Commission (SEC), BlackRock's iShares Bitcoin Trust will use Coinbase Custody as its custodian.

A spot Bitcoin ETF would track Bitcoin's underlying market price. Proponents say an ETF would give investors the widely hailed opportunity of exposure to Bitcoin without directly buying it.