A lot of people use this to ride the wave. They put their alt coins into bitcoin, wait for their alt coin price to drop and the bitcoin price to rise, then at the top of the wave they buy into the alt coins again. This can make someone turn 500 Steem into 700 Steem within a few hours by doing nothing but trading back and forth.
It can definitely be risky though and there is a big chance of losing money as well.
Yeh, sometimes we don't care about risky situation, we just want to make some money out of nothing :)! Great post!