I think the most profitable ways to earn cryptocurrency are illegal.
Change your mind, they're not.
I would still recommend proper exercise after a long work day at a desk.
Not every physical activity is equally healthy. It is important not to overdo it. Particularly if your muscles have weakened due to inactivity.
This I don't do anymore for years.
And you know what? I'm quick in getting tired and trying to catch my breathe. But as long as I get myself a sweat, that's already good to me.