Which one do you thing will up up to 100% gain tomorrow?

It is difficult to predict with certainty which stock will experience a gain of up to 100% tomorrow. However, based on your interest in high-risk, high-reward investment opportunities and your preference for stocks under $1, I would suggest considering Danimer Scientific Inc. (DNMR).

Reasons:

1. Potential for Short Squeeze: Danimer Scientific has a high short interest, with Ortex estimates indicating that 25% of its float is held in short positions. The company has also not been compliant with the New York Stock Exchange's listing requirement of a minimum share price of $1, adding to the potential for a short squeeze.
2. Recent Negative Performance: The stock has experienced a significant decline in price, trading at around $1.59 as of February 16, 2024, down from a public offering price of around $30 per share in December 2020. This recent negative performance could indicate a potential for a rebound.
3. Non-Compliance with Exchange Requirements: The company's non-compliance with exchange requirements could also contribute to increased volatility and potential for a short squeeze.

While it is important to note that predicting stock movements is inherently uncertain, Danimer Scientific meets the criteria you are looking for and could potentially offer a high-risk, high-reward investment opportunity.