Yes, it was a temporary game for diversity and a rapid increase in profits. Bitcoin is much stronger and everyone will return to him.
Well, its a trend these days. When bitcoin prices are going higher people sell their alts to buy the bitcoins and on the other side, when bitcoin prices are low we see high in alt prices as people tend to move from bitcoins to altcoins.
Not for these days but it's just usual trend in crypto trade. If the price of bitcoin gets plunged and a lot of bitcoin traders try to get his profit through using altcoin. and other wise they will go back if the price of altcoin gets dumped and try to FOMO bitcoin and at the same time pumping the price of bitcoin.