So how can they say with a straight face that bitcoin is a scam if their counterparts are already accepting it.
It's the same with all the big banks. "Do as I say, not as I do". Publicly, they call bitcoin a scam because they know it threatens the fiat monetary system that they have worked so hard to control. It threatens their ability to suppress the working class, to buy out politicians, to influence elections, to line their own pockets. But they also know bitcoin isn't going anywhere, so while they publicly call it a scam, they work behind the scenes to invest in it so they aren't left behind. While Jamie Dimon goes on television to say "Bitcoin is a fraud and a Ponzi scheme", his own bank is buying bitcoin and recommending to their investors to put a percentage of their holdings in to bitcoin.
For bitcoin, it is either a believer or a non-believer!
It reminds me of that quote by Neil deGrasse Tyson - "The good thing about science is that it's true whether or not you believe in it". Dimon and Buffet can call bitcoin a fraud all they like. Meanwhile, I'll continue to use it to send money to friends and family and purchase goods and services without any centralized third parties, without any middlemen, and without any influence from banks or governments. The good thing about bitcoin is that it works whether or not you believe in it.