Miracle keywords in SEO

In the SEO industry we work for some keywords to bring traffic, users and business but some time our website showing on Google or other search engines with few very important keywords, these keywords having very good number of searches, big completion and the fact is that we never think for the website promotion on these high searchable and competitive keywords, as they need lots of work and efforts so we never try for these, but if we start work on these keywords then we observe that our website going down from SERP, why?... because Google is think that you are start targeting this keyword in various source so it stop natural promotion, means if you are targeting ‘Almonds benefits’ then soon you can see your website on ‘Almonds’ over the search engine same with the ‘Aloe Vera Benefits’ and you can see your website on ‘Aloe Vera’  so these keywords ‘Almonds, Aloe Vera etc’ are called miracle keywords because no one predict that their website can come on these high traffic and competitive keywords.