The big players (Citibank, BoA, Chase) will ACH $ into your bank account which you can then use to buy whatever you want.
Dave - thanks for this. Yes - I am in the U.S. Not quite sure if I follow you. It's been my understanding that "Balance Transfer" is a "Card-to-Card" transaction and is a cashless transaction. Just the transferring of debt from one card to another, and cash never enters the picture. Tell me more.
Also, I've already checked with the 3 companies you mentioned directly (Citibank, BoA, Chase; customer service over the phone), and all 3 were adamant that they don't allow the purchase of BTC with their Credit Cards. Thanks....
Nope they just hope you borrow money, can't pay it back and then wind up paying stupid high interest rates.
From my citibank CC, here is one heavily redacted screenshot. Most of the time you can do transfers anyway you want.
As for buying BTC from the card, when you call that is their standard response to the question.
But, I know people who have done it many times with no issues. And others who have never been able to do it once.
-Dave