Not necessarily the most stable.
The light red coloring of Maid vs most other currencies means the price of Maid is mildly inversely correlated with those curencies, while most coins seem to have a positive correlation with the price of other coins, shown by the largely grey/black colours.
A portfolio containing various coins plus a good portion of maid would likely have been more stable during this period than a portfolio without Maid due to its negative correlation with many coins.
It's interesting that Maid is the only coin with a positive correlation with Bitcoin over that period.
Would be great to see similar charts over longer or various periods to see how different the market for Maid really is.