It will take time but it will eventually happen, I see cryptocurrency market cap growing past 1 trillion in the near future.
$1 trillion will not come from thin air. When you talk about such a huge figure, you need to give the justification for it as well. Nowadays, most of the cryptocurrencies are being solely used for speculative investment purposes. Unless the other uses, such as payments and smart contracts increase, I don't think that the market capitalization is going to rise in a big way.