Read more: https://news.bitcoin.com/institutional-demand-bitcoin-crypto-resurges/
Because the Bitcoin and the altcoins are now very much affordable to purchase to start a brand new investments so it is natural that most of the rich investors will grab this opportunity, in fact there is a latest news that a certain chinese bought 10,000 Bitcoin during the ultimate dip https://www.ccn.com/chinese-angel-investor-gathers-10000-bitcoins-during-bear-q1-2018/. So this is the simple logic of joining an investments in which to sell it high and buy it low again.