There is no single person on earth who haven't heard of bitcoin.
I don't agree with it. I mean max only 10% of the world population might have heard about BTC not more than that...reason is quite simple. More than 3 billion people earn and live less than $2.50 a day in which More than 1.3 billion are extremely poor so people who are struggling hard to meet 2 ends of life can't be expected to hear about any virtual currency.
Everyone is talking about it, it's all over the news, everyone is buying it, price is dramatically increasing.
It's like gold rush back in 1848.
Thats true BTC is trending on news nowadays, Investors are interested in buying it.
So why aren't we calling this bitcoin rush?
You know, in 20 years from now it would be funny to say - yeah, i bought/mined bitcoin during bitcoin rush back in 2017

We can't call it a rush....It is either a new trendsetter as new mode of payment or a revolution in world to get rid of fake Fiat web.
Bitcoin fever means it's depends upon the investers only now a days the buyer was increased due to the rate of bitcoin it above the $19 k so due to this bitcoin fever all are work like continuesly and with out rest so in future it rate was increased so the fever was came and still rate was fall down the fever will continue.