If you're right, you'll get a small medal for persistence
At the moment, it's only one theory, and it doesn't really fit with other observations. In theory, most salts should have been flushed away by repeated temperature cycling and long-ago freeze thaw.
The surface sediments of Mars don't show signs of reactions with liquid water.
However, if the soil analysis shows the right sort of salts at the right concentration, and the models of soil cohesivity confirm the presence of a trace of eutectic liquid, then you win the bet.