flippa seems down to me. the link is not working.
I wanted to see how the auction is going. I don't see anything special in this domain. BTCs.co doesn't make any sense to me. it would worth something if it was BTC.CO
BTCs totally makes sense. It literally is the plural shorthand for Bitcoins. Just checkout the many crypto headlines using "BTCs" instead of Bitcoins
Shark Tank Judge Kevin O’Leary Is Concerned About
BTC’s (livebitcoinnews)
MicroStrategy Purchases Additional 2,574
BTCs (ihodl.com)
First ETHs, High
BTCs, Pushed USDCs and 20 Crypto Jokes (cryptonews.com)
Bitcoin Mining Rigs Struggle for Profits, Despite
BTC's Hashrate (bitcoin.com)
Analyst Tracks Bitcoin, Ethereum and XRP Trajectories After
BTC’s Burst to All-Time High (Daily HODL)
After
BTC’s $2K Crash in Two Days, Will This Level Stop the Bloodbath? (Bitcoin Price Analysis) (Crypto Potato)