I believe that people start up cyrptocurrencies because they either want to make some money or maybe experiment with the internet. It's basically like when a scientist test run a new gadget. It still is amazing how these cryptocurrencies live though. What do you think?
Yes, they just give it a shot if their coins could survive and success in the cryptocurrency market, but the main purpose they created a new coin for profit/to collect more money obviously. Those coins will be used for trading and speculation to pump its price, whether it will works or not but in the end people would know which coins are worth to use.