Consider the fact that ether handles more transactions than all other blockchains combined!
Oh really, you are referring to all other blockchains combined and that includes bitcoin? Are you sure? You might want to restate your statement here. IMO bitcoin handles more transactions than eth.
That will be the case if ether continues to be the main platform for ICO's. But if it is dethroned by something better than it, then it won't hit a 1 trillion market cap. Still, I don't think that eth will dethrone bitcoin and steal it's crown. It can always be 2nd or 3rd place though.