There is absolutely no way to tell if an ale is finished except with a hydrometer, but if the krausen hasn't fallen it is still actively fermenting. Brewing without a hydrometer is a little like golfing without holes. Just getting to the green doesn't mean you're done. The end game really matters.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk