"When nothing goes..."
If you have to log out, you may be able to log in on your new device. The platform may prevent multiple simultaneous logins to the same account. I don't know, so that's why I strongly recommend first confirming that with a professional Hive developer.
"...keep in touch with you?"
Sure can! I keep a PO Box for various professional purposes. I believe Germany has an anonymous service you can use to prevent being linked personally to physical mail you send (there's someone that uses it to provide me Christmas cards every year). Just don't send anything that can explode.
Valued Customer
POB 713
Pacific City, OR 97135