Everything we do is calculation. We post a few "high authority" links and speculate that it will jump a few pages in search result. Nothing is absolute. We calculate how many links we need, how often to post, where to post and even after all that, we can not guarantee that our website will hit #1 in Google. If you are a client who purchase 'seo services' in the BHW marketplace, you make a small 'gamble' on that particular seo service to boost your website ranking. I doubt, you have an absolute certainity. The deeper you are into your research, the more data you can collect to make these calculations. There is a reason why Magicians and famous mathematicians aren't allowed in casinos. The can count, calculate and keep on winning all the time! Investing is not gambling. You don't need to be a mathematician to do calculations. A few hours of homework is enough to get you started. Coinmarketcap is just one website. Google it. You will find plenty of others with almost the same data updated in real time (with a lag of 2-3 mins) I haven't posted it in the Black Hat SEO Section. The thread is posted under "Making Money".