Some useful tips -
Learn more about the investors and founders of the company
Read the whitepaper to understand the road-map and future plans
Credible companies will be transparent about how the funds will be used
Consider long-term use for the coins that you’re purchasing
Search on social media channels to check the activities
Great companies will have a great customer support structure. Try to ask questions on the support platform.
Good luck and have fun!
Good points there..
Be careful with the customer service though...It's so easy to get fooled online
Why don't you write a post and share your experience (without mentioning the names) ?