That's impossible crypto value change every second, it's the customer that has to use coingecko or coinmarketcap or any big website updated with current prices and do the correct conversion. It's not hard, took me 2 minutes yesterday to order 10+ kits of HGH.On pricing the source should show an image of the total cost alongside a locked in crypto value
Plus I for example never pay in BTC but always in Monero, of course Monero has different value then BTC etc. So showing crypto value make no sense.
Ppl just need to stop being lazy and care about their OPSEC more.