 WisdomTree Investments NASDAQ:WETF has named US Bank as its custodian in an amended re-filing to the Securities and Exchange Commission SEC for its Bitcoin exchange traded fund ETF. The US asset manager, with US76mln assets under management, made its first filing for a spot Bitcoin ETF back in March this year, prior to crypto custody services being offered to institutional investors by US Bank, which is a subsidiary of US Bancorp. 