Research a good project and invest in that.
Here is a project which I found promising where one can earn coins forever. Worth investing.
It's a good project and is in its initial stage. Intended to work for IOT and Nano-Tech.
Seems profitable.
They introduced PMA (Permanent Master Address), most probably they are restricting founder's profit and providing the same to miners and investors.
More Info about this crypto and project is here Doppler Website
https://bitcointalk.org/index.php?topic=4553663.0
An airdrop is also going to conclude this week which you can opt for now.
All contact links and information on their website.