25% of ALL SALES Due to Gains in Crypto Market Caps - Massive Drop in Sales Coming?

Gammon quickly outlines that up to 25% of Sales are related to the increase in the market caps of Cryptos and the inference would be that Sales are going to drop off massively should Cryptos continue their decline.
George's full video: https://www.youtube.com/watch?v=j4tUelbcVxA