My pick would be Zurcoin. A 3+ Quark based coin that has a very low market and is getting used by a project. This one is well under $1 with it only being half a cent.

Check out this article: https://coincurrencynews.com/2017/12/07/zurcoin-and-monkey-team-up/

Key points:
- M0NK3Y is the world’s first decentralized hedge fund and the largest Crypto hedge fund in
the world by total size (over $1bn).
-In August 2017, we bought up over $250,000 of ZURCOIN, amounting to 20 million coins. We then re-sold 10 million coins over the forthcoming two months in order to stimulate the
market. Since then, the coin has been featured on numerous POW mining networks, is part of
Georgia-based Golden Fleece’s mining arrangement (10% of all Crypto they mine is
ZURCOIN) it has been listed in CoinGekko and even mentioned in the New Zealand Herald.
Having succeeded in reactivating a dormant Crypto, M0NK3Y is now moving onto the next
phase in development with Z list the coin on HitBTC and
Cryptopia and Open LedgerURCOIN alongside its developer Shai. Together, M0NK3Y and
Shai will roll out a reengineered hybrid POS-POW coin, and pursue a media
campaign. In addition, M0NK3Y and the coin’s developer will put ZURCOIN on a brand
new exchange as an “alternate trading pair” within the next month. M0NK3Y will also bring
ICOs who want to accept ZURCOIN as payment for their coin offerings.

It is currently trading between 30-35sats with 0.X BTC of volume daily on YObit https://yobit.net/en/trade/ZUR/BTC.

It has a market cap of $425,000 and has a cirulating supply of 87 millions. It is a highly undervalued coin. Yet I would only advise you to put in a small bit of btc in considering it is so cheap and you can own 1/100th of the supply for only 0.25 btc.