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US-based Kingdom Trust has launched a unified retirement account that covers investments including digital ones such as bitcoin.

Clients can buy, sell or hold stocks, exchange traded funds, digital assets and other investments via a platform called Choice. Kingdom Trust, which backs Choice, is a custodian that powers more than 100,000 retirement accounts, across an account base of more than $13 billion.

The coverage of bitcoin and other digital assets highlights how these areas – once the preserve of a small minority of investors – appear to be opening up. 

"By our estimates, there are 7.1 million Americans who own bitcoin, have a retirement account, but currently don't have the option to hold bitcoin in their retirement account with their other assets. That changed today, bitcoiners now have a choice and it's backed by one of the top retirement custodians in the market," Ryan Radloff, CEO of Kingdom Trust, said.

The launch of the Choice platform follows Kingdom Trusts purchase of digital asset and retirement focused Choice Holdings, built by prior CoinShares founders, including Radloff, this year.

Kingdom Trust is an independent qualified custodian regulated by the South Dakota Division of Banking.