Depends.

The hypothesis is that the ME lets govs remotely control/read memory and CPU state, which would grant them access to decrypted disk space.

Assuming you kept your #Bitcoin keys airgapped from the machine, then the potential consequences of being targeted via the ME would seem to be (A) loss of privacy; ability to capture wallet balance, transactions, and any passphrases inputted directly into the machine and (B) the potential for a malware injected that lied to you about send or recieve addresses on screen.

These are high cost exploits for the state and the return is pretty low, so I would say overall it's a 'nice to have'.