This is not strictly speaking true though, is it? I use a crypto wallet account visa card to make BTC purchases, it just converts to fiat in the process, but I spend my Bitcoin. Also, some companies accept BTC as payment, especially online and in certain parts of the world I know they do. In addition, some major companies are slowly becoming more involved with crypto in general and using it as part of their offerings in terms of payment, etc. One good example would be https://cryptolinks.com/cryptocurrency-trading-tools. like the one I used.