You can use multiple exchanges, and their OTC services.

I'm pretty sure you can move $1M as of today. For example, have a look at 

The minimum trade amount is an equivalent value of $100,000 USD. There is no maximum size for trading over chat.

bitcoin

Self-custody stacking at scale ain’t easy

halalmoney

You can use multiple exchanges, and their OTC services.

I'm pretty sure you can move $1M as of today. For example, have a look at [Kraken OTC service](https://www.kraken.com/features/otc-exchange):

> The minimum trade amount is an equivalent value of $100,000 USD. There is no maximum size for trading over chat.  
