when all that money comes back into bitcoin because it was time and also because altcoins are dying, the price of bitcoin goes up like this.
this description seems to be a zero sum game because as many people must have bought in at the top as sold out, so the net amount of money from this = 0.
those who act quick, they sell bitcoin on top (the top price was ~$1260) even selling on $1230ish
then buy the shitcoins that were about to pump like Dash and Eth each at the bottom of the price around $50 and $20 respectively and then dump them on top around $105 and $52 respectively and that is a 100% and 150% pure profit that will come back to buy bitcoin
and this is mostly an answer to those who love reciting altcoin prices in USD.