Focusing on a single coin and analyzing the market to understand its sentiment can be a good starting point for cryptocurrency trading, but there are some limitations to consider:

Market Diversification: By focusing on just one coin, you miss out on potential gains from other coins that might be performing well. Diversifying your portfolio can help mitigate risk.

Limited Trading Opportunities: The market doesn't always present profitable opportunities for the specific coin you're interested in. By considering other coins, you increase your chances of finding good trades.

In-Depth Analysis Required: Properly analyzing a single coin requires deep research into the underlying project, technology, and market sentiment.

Here's a suggestion: consider focusing on a small number of coins (2-3) that you've thoroughly researched and believe in. This allows you to stay focused while also taking advantage of opportunities in the broader market.