Cryptocurrency is already an alternative payment option to several countries but not arent still adapting. You can pay your online shopping (but not all of them) and even travel bookings. You can even buy a new house as long as the you and the seller had the agreement. In US, BitPay has handled other real estate transactions, including a Lake Tahoe properties i believe.
Check the updated link for several retailers that are accepting crypto as alternative payment option.
https://www.lifewire.com/big-sites-that-accept-bitcoin-payments-3485965