Any other exchange for IOTA other than Bitfinex ?
Binance and ydx
Is it worth investing now, or I'm late to the party?
Imho it's still early to join, the devs and community work very hard, you can check also how many great people joined IOTA here:
https://blog.iota.orgYes there is new developer of iota he is Samuel Reid. Samuel Reid is a mathematician, business executive, inventor, and STEM polymath. As the CEO and a Co-Founder of Geometric Energy Corporation since June 2015, he delivers mathematical and scientific consulting to industry, academia, and government. He is honoured and happy to join IOTA as I believe my mathematical background and drive for IoT innovation will provide a driving force of positive transformational growth of the IOTA project and ecosystem.
https://blog.iota.org/welcome-samuel-reid-to-iota-744469bce973 that is good for iota.