good sources are limited. there are only sources that help you to stay up to date.

twitter, reddit, bitcointalk and steemit are good information sources.

but the best you can do is to inform yourself. to inform you about the teams who is behind it. The following questions are important

• What are the developers' references?
• How is everything set up?
• How professionally the teams work?
• Is it just marketing or can the developer team also deliver?
• How much experience the whole team has.

To the stellar topic. You might be lucky about stellar. JedMcCaleb is of course someone who has great experience and has already developed mega projects. For this purpose IBM has joined and many many more.

2018 will be very interesting for stellar as some ICOs are supposed to start.
Right now, I think $1 is possible. However, it depends on the rest of the market.