It has it's own codebase and whitepaper called CryptoNote (https://web.archive.org/web/20201028121818/https://cryptonote.org/whitepaper.pdf)
Why not 0.01337 (about 2€), 0.0069 (about 1€) and 0.001337 (about 20 Cents)? :D
Holy! I might be a bit late to the party, but I just checked the recent numbers from ShopInBit.com for june:
#Monero 74,54 % 👀🤯🥳
#Bitcoin 23,64 % 😂
#LightningNetwork 1,73 % 🤣
FIAT 0,08 %
https://xcancel.com/shopinbit/status/1811651225005195471
Also they said if Monero surpasses the volume of Bitcoin in the next two month, they change their bio to "Europe's biggest Bitcoin and Monero Store" (which should obviously name Monero first but whatever xD).
Btw the numbers for coincards.com show a similar but not as devastating picture:
#XMR: 34.4%
#BTC (Onchain): 25.96%
#USDC: 20.20%
#ETH: 9.84%
#LTC: 2.49%
#Solana: 2.31%
#Dogecoin: 2.09%
#LightningNetwork: 2.08%
#USDT: 0.58%
#Dai: 0.04%
#Matic: 0.01%
#Dash: 0%
interesting 🤔 It once again fits into the broader picture 🤯