XRP, IOTA is 2 altcoins priced under $ 0.5 but we are very reassured about it.
I still do not understand why XRP consider a cryptocurrency. Ripple isnt really a Blockchain technology, its sort of a payment system.
Stellar, IOTA, NEM, ICON In my opinion, top coins in the range of $ 0.5
I have not yet researched the coins you are referring to. I will try to study these coins.