Add cryptocurrency price command via CoinGecko API

New features:
- !crypto <SYMBOL> command to query cryptocurrency prices
- CoinGeckoAPI integration (free, no API key required)
- Support for 20+ popular cryptocurrencies (BTC, ETH, DOGE, etc.)
- 24-hour price change and volume data
- Colored embeds matching price movement
- Alias: !c for quick crypto queries

Uses CoinGecko's free /simple/price endpoint with 30 calls/min rate limit.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

bot.py

@@ -9,6 +9,7 @@ import pytz
 from config import Config
 from stock_api import YahooFinanceAPI, FinnhubAPI
 from market_hours import MarketHours
+from crypto_api import CoinGeckoAPI
 
 
 # Configure logging
@@ -39,6 +40,7 @@ class StockBot(commands.Bot):
         self.target_channel_ids = [int(id) for id in Config.CHANNEL_IDS]
         self.primary_ticker = Config.PRIMARY_TICKER
         self.startup_announced = False
+        self.crypto_api = CoinGeckoAPI()
 
     async def setup_hook(self):
         """Initialize the bot and set up scheduled tasks."""
@@ -212,6 +214,57 @@ class StockBot(commands.Bot):
 
         return embed
 
+    def create_crypto_embed(self, crypto_data: dict) -> discord.Embed:
+        """
+        Create a formatted Discord embed for cryptocurrency price data.
+
+        Args:
+            crypto_data: Dictionary containing crypto information
+
+        Returns:
+            Discord embed object
+        """
+        symbol = crypto_data['symbol']
+        current_price = crypto_data['current_price']
+        change_dollar = crypto_data['change_dollar']
+        change_percent = crypto_data['change_percent']
+
+        # Determine color based on price movement
+        if change_dollar > 0:
+            color = discord.Color.green()
+            change_emoji = "📈"
+        elif change_dollar < 0:
+            color = discord.Color.red()
+            change_emoji = "📉"
+        else:
+            color = discord.Color.blue()
+            change_emoji = "➡️"
+
+        # Format change string
+        change_sign = "+" if change_dollar >= 0 else ""
+        change_str = f"{change_sign}${change_dollar} ({change_sign}{change_percent}%)"
+
+        # Create embed
+        embed = discord.Embed(
+            title=f"{change_emoji} {symbol} Price",
+            description=f"**${current_price:,.2f}**",
+            color=color,
+            timestamp=datetime.now(pytz.timezone('America/New_York'))
+        )
+
+        embed.add_field(name="24h Change", value=change_str, inline=True)
+        embed.add_field(name="Previous Price", value=f"${crypto_data['previous_price']:,.2f}", inline=True)
+
+        # Add volume if available
+        volume = crypto_data.get('volume_24h', 0)
+        if volume > 0:
+            volume_str = f"${volume:,.0f}"
+            embed.add_field(name="24h Volume", value=volume_str, inline=False)
+
+        embed.set_footer(text="Data from CoinGecko")
+
+        return embed
+
 
 # Create bot instance
 bot = StockBot()
@@ -240,6 +293,29 @@ async def get_stock_price(ctx, ticker: str = None):
     await ctx.send(embed=embed)
 
 
+@bot.command(name='crypto', aliases=['c'])
+async def get_crypto_price(ctx, symbol: str = None):
+    """
+    Query cryptocurrency price.
+
+    Usage: !crypto BTC or !c ETH
+    """
+    if not symbol:
+        await ctx.send("Please provide a crypto symbol. Usage: `!crypto BTC`")
+        return
+
+    symbol = symbol.upper()
+    logger.info(f"Crypto query for {symbol} by {ctx.author}")
+
+    crypto_data = bot.crypto_api.get_crypto_price(symbol)
+    if not crypto_data:
+        await ctx.send(f"Unable to retrieve data for crypto: {symbol}")
+        return
+
+    embed = bot.create_crypto_embed(crypto_data)
+    await ctx.send(embed=embed)
+
+
 @bot.command(name='ping')
 async def ping(ctx):
     """Check if bot is responsive."""