$BTC
Here are a few options for a 100-character description for "$BTC":
1. "$BTC: Bitcoin cryptocurrency"
2. "$BTC: Digital gold & store of value"
3. "$BTC: Decentralized peer-to-peer currency"
Or, if you'd like something even shorter:
1. "$BTC: Bitcoin"
2. "Bitcoin $BTC"
Let me know which one fits your needs!
