It's a cowboy thingy from da movies.... they always say Let's Ride... "it is time to go."
Next stop, next town. Time to hit da bar and do a lil' gambling. Find a few lost dollars. Maybe a lill' gold dust.
In the latest Star Trek movie James Tiberius Kirk says the phrase "Let's Ride!', when he gives the order to move the Enterprise into warp speed, ready to engage what awaits him and his crew. Let's Ride!
It means hang tough, keep buying, don't sell, at a time when the pond was less muddy, the frogs where little tadpoles, a beaver had just begun to build his dam, and a very wise kitty walked the banks searching for opportunity while educating the pond critters.