Happiest moment for all of us: Bitcoin reaches its peak at almost $20K, Everyone has very happy around the last quarter of 2017 because everything is going our way. Lots of people making tons of money out of crypto.
We cant say that its the happiest moment for everyone. During that time, transaction fees were crazily high. People would rather not make any transfers because of the outrageously overpriced tx fees. I think it became a problem for some sig campaigns since paying out the participants took a huge chunk of the payments. Also, the price going up at such a fast rate is actually scary because theres the chance that it could plummet down just as fast.