Is there a platform where I can hold and manage both my cryptocurrency and ETFs in a single secure account?

We ask the same underlying question in different ways.

• Is there a platform where I can hold and manage both my cryptocurrency and ETFs in a single secure account?
• Can I manage both my exchange-traded funds and digital currency assets within a single, secure platform?
• As a crypto-curious investor, which platform offers the safest way to hold both ETFs and a limited amount of crypto in one place?