In the past few markets, Bitcoin is the only Bitcoin I bought. The only Bitcoin I bought was the remaining Bitcoin when I was playing inscriptions, especially the ARC20, which has the most BTC left in one coin and one satoshi.

Satoshi is the smallest unit of BTC. The protocol feature of ARC20 is that every mint of a coin will be bound to 1 satoshi as a carrier, and it will never return to zero.