He can't obtain a valid patent on that because bitcoin is open and unpatented years before Wright ever heard of it.  Once something is published that becomes a bar to patentability called prior art.  But this doesn't stop someone from making spurious patent lawsuits as a form of harassment, they'll ultimately lose, but they still waste their opponents time and money.

Of course, he could attack other altcoins but most major altcoins have massive premines that they can use to pay him off-- or use to fund litigation to stop him.  His scheme mostly centers around harassing Bitcoin and Bitcoin forks and so far he's left other altcoins alone.