can someone suggest me best coins to invest in 2018 which are less than 5 or 10 cents
In my opinion, it is better to make your own research and trust your guts.
The most of the privacy coins are undervalued right now.
The best opportunity is to find a
privacy-related project with a low total supply
(less than 100M), that way the price will be increasing much faster.
I recently found
a hidden GEM called
Ethereum Meta, it is related to anonymity and untraceable transaction. They have a very interesting project to build the Anonymous E-Market Place.
They are on
ICO stage and already trading on some exchanges, you can check their website:
https://ethermeta.com/Or even better go through their Bitcointalk thread:
https://bitcointalk.org/index.php?topic=2659058.0