Sygnum Bank has expanded its off-exchange custody platform to include Bitcoin and crypto options platform Deribit.Deribit has partnered with Sygnum to enhance security and prevent asset hacks, following recent cyberattacks on exchanges.Sygnum's off-exchange custody platform, Sygnum Protect, will allow Deribit users to store their assets while maintaining liquidity.Sygnum is the first digital asset bank to offer an off-exchange solution for institutional traders and recently raised $58 million in funding.