I'm a newbie at crypto-speculation and I've also noticed the same thing: If an increased adoption result to an increase in price, then why does the opposite thing happen? Is it because of the faint-hearted bagholders that tend to panic sell whenever there are some rumors or is it because there are some tricks happening that are controlled by those whales? I'm confused o.O
Well, I'd guess that it appears to be the case because 1) you are considering a small sample size of data, and 2) markets are constantly pricing in a variety of factors. The causes for the drops are actually related to other factors, or possibly some adoption is already priced in.