It's expected, since the price of bitcoins has gone down and the hype just died down. The hype cause a lot of people to get curious about bitcoins back in december and now the effect of the sudden loss of momentum can be seen. I think it' just natural to happen and bound to happen. What is nice though is that we now know that the world knows what bitcoins are and that is good for bitcoins.
Exactly, and I would assume that the google searches peaked during the December madness. So obviously, since we are experience a slump, I wouldn't be surprise that the google searches will tend to dip. And then there's government regulations, social medias like Facebook and Twitter banning ICO advertisement has something to do with the hype dying down as well.
But I'm sure that it has reaches as far as the four corners of the planet and sooner or later we will see another peak when the price hits all-time-high again.
The hype from the 2017 price jump just died down that's why. Most people who heard about the fad are just not interested anymore because the price isn't what it once was and they're probably thinking that it's too late to invest time and money. 
