This makes an assumption that all altcoins are competing for the same market space as bitcoin, which is clearly not the case.
Lisk, Siacoin, IOTA, and NXT to name but a few, are not positioning themselves to be primarily a currency , as these projects seek to make use of blockchain (and the tangle in the case of IOTA) to support myriad other uses where the advantages are applicable.
If you were to slightly amend the article to make clear that you are speaking about altcoins used primarily as currency the points you make within would be much easier to agree with :)
Cheers. - @parallaxx
RE: $1 TRILLION Bitcoin? - Why It Might Not Be So Crazy