Looks like coinbase is now asking where your BTC is going every time you send it out, to another exchange or not.
Have own private wallet so NO for me.
Don't mine to a coinbase address, after 200 or so transactions and/or $20,000 they start to ask questions, of where the money is going, where it is coming from etc. Create an address yourself, mine to it to consolidate the transactions and then send it to coinbase in less but larger transactions.
Mine to an address you control not someone else.