Whether to take profit at $1 for ADA (Cardano) depends on several factors, including your risk tolerance, investment goals, and the overall market conditions. Here are a few things to consider:

Technical Analysis: Look at the current price trends and resistance levels. If $1 is a key resistance, it might be a good place to lock in profits. However, if there's a bullish trend and momentum, it could continue to rise.

Fundamentals: Is there any major news or updates (like a major development or partnership for Cardano) that could influence its price positively or negatively? Strong fundamentals might suggest holding a bit longer.

Long-Term Goals: If you're aiming for long-term gains, you might prefer holding through short-term fluctuations. But if you’re trading for short-term profits, locking in at $1 could be a good move.

Market Sentiment: Be mindful of the broader crypto market trends. If the market is generally bullish, ADA might rise beyond $1. In a bearish market, it could fall back, and locking in profits could be safer.

Ultimately, the decision to take profits at $1 is personal and should align with your overall strategy. If you're unsure, consider using a stop-loss or a trailing stop to secure profits while giving some room for potential upside.