You must know that it just shows situation at the moment, while you will setup your rig to mine, another new coin will become more profitable. And where is information about millions of U.S. $?
that's correct , its pretty silly and simplistic to invest in what is technically the most profitable in that second.
unless you are looking to get in and out in that second.
better to look at all the information, and think about what will be around more long term. that way any small investment could pay off large in the long term either mining or buying.