What are the most promising low market cap coins that are still under $1?
It doesn't really matter if a coin is under $1, because you must consider also the total supply of the coin. If a coin supply is 100 trillion, it will be under $1 even if its market capitalization is higher than Bitcoin's. You should be looking at market cap instead. It's still not a perfect measure of the coin's value, but it's as close as you get.
exactly this may be one of the best option to be dont just ever look for the price on it on how much is it only that you may have the chance of that you are able to take that for.