Look for some good projects. Like this one and invest. Seems like 200% profit guaranteed.
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
All contact links and information on their website.