Please tell me a good reason to buy this coin and I buy now anything that make it different from the rest. does it have a unique feature?
The Choice is yours, my friend.
In all honesty, most coins are very similar. I can tell you what I look for in a coin.
1. Active Development Team
2. A Roadmap of achievable goals
3. Positive Community
4. IRC and social media activity
5. Consistent trade volume and price stability.
6. Healthy Price Spread.
7. Developer Responses (Mature or Juvenile)
8. Competitive Blockchain Technology
9. Mining and or Multi-pool
10. Usability outside of coin exchange
Those are the main things I look for in a coin, I love Opal as I should and it meets every point, but I am no fool I invest in other coins that meet my criteria as well.
So, all I can say is use your best judgement and don't depend on others to tell you why you should buy.
Good Luck and I am hoping to see more of you in the community.