The largest international bank in the UK, Barclays, has closed a long-running negotiation with investors in the round that had been postponed since November by investing in cryptocurrency custody startup Copper’s most recent round.

This brings to an end a delay of more than nine months for Copper’s $500 million Series C investment round, for which a $3 billion value was sought. That amount has been decreased to $2 billion due to a weakening cryptocurrency market and diminishing investor enthusiasm.

In 2015, Barclays encouraged charities to accept the emerging asset class as a form of gift, becoming the first bank in the UK to support cryptocurrency, specifically bitcoin. The bank has a troubled history with the sector, including refusing to work with dominant exchange operators Binance and Coinbase.

Delays brought on by Copper’s dispute with the UK’s Financial Conduct Authority regarding that nation’s Temporary Registration Regime had complicated investor negotiations, particularly with Tiger Global, a repeat investor.

When Copper opened a hub in Zug, Switzerland as a result of a partnership with the world’s largest traditional custodian State Street, frustrations over the UK financial watchdog’s rule—which required digital asset service providers to apply for temporary registration in order to continue trading—reached a fever pitch in March.

Dmitry Tokarev founded Copper in 2018, which offers institutional investors custody, prime broking, and settlement services. In June of last year, the company completed a $50 million Series B investment round with an undisclosed valuation.