“I could care less about bitcoin…. I don’t personally understand the value of something that has no actual value. You all can do whatever you want and I don’t care….. If you’re stupid enough to buy it, you’ll pay the price for it one day. I’ve also told people that it can trade at $100,000 before it trades to zero. The only value of bitcoin is what the other guy’ll pay for it. Who cares about bitcoin? The world economy’s so big, JPMorgan alone, $6 trillion, we move all this money, and bitcoin in total, all these currencies, $50 billion dollars, maybe a billion dollars trades a day.
The other thing I’ve always [said] about bitcoin, governments — and this is not a technological statement — governments are going to crush it one day.”
Eulogy made by Jaime Dimon
I think the phrase you’re after is, “couldn’t care less”.