Because he doesn't understand Bitcoin.

There is bitcoin as an asset, there is Bitcoin as a payment network.

The payment network alone operate more efficiently with less fee than companies like western Union. It also is more secure and transparent than SWIFT.

Buffer should ask himself how much went into developing SWIFT and that's pretty much the cost basis of bitcoin as a payment network.

Bitcoin is like fiat, except it is more neutral and universal than majority of fiat out there.