This is one of the smart contract based project, IOT and blockchain integration. Most of the smart contract based coins used to grow better in the marketplace. Hence you do not need to have the doubt that contractnet is only worth for 100 USD alone.
You may take up investment how much ever you want buddy.
If you missed contractnet on the token sale. I am sure you will worry that you have lost the profit of the best project.
I've already purchased my token my friend hasn't tho i know he would eventually, any serious investors wouldn't consider $100 as a significant criteria as to invest or not invest.