when bitcoin price is stable there is no way to make a profit from trading bitcoin in short term. you can buy and accumulate bitcoin at that price but you can't make a profit in short term from doing so.

this little fact means traders switch to altcoin market to make profit. they pump the altcoins they see fit (usually low priced altcoins) to take advantage of bitcoin's stability, make a lot of profit then go back to bitcoin with that profit.