This idea is stupid, it's trivial to create thousands of virtual smartphones that will report that they are moving, and there would be no way distinguish between them and legitimate users. All these "proof of human" type of coins fail to create a truly secure system, because this problem is quite fundamental and people outside of crypto couldn't solve it to this day, so how can some noname startup succeed here?
In some way, the system can be cheated by anyone worldwide. But it can be perfected over time, if there's demand for something like this from people in the mainstream world. What I know is that getting paid by just walking, could lead us towards a much healthier society in the future. A mechanism that would prevent cheating via sensors and the use of a camera, would make this more practical for mainstream use. Instead of making a cryptocurrency from scratch (like the MangoCoinz project did), one could create an ERC-20 token specifically for this purpose. With mainstream adoption, I'm sure that "mining crypto by walking" will be a big hit for years to come.
Any cryptocurrency that can be gained so easily can likely be gamed. There would to be 2 systems in place to prevent this using your idea;
1. Walkers would need to somehow
unequivocably prove that they were indeed walking, rather than strapping their phones to one of those Pokemon Go-esque fake walking devices.
2. The reward would need to be so small that nobody would bother faking it, or running 100 phones at once to multiply their rewards.
If (1) is true, then the barrier to entry will be too high to make it casual. If (2) is true, then it won't properly incentivize people to use it.
With that said, I do like the concept of being
incentivized to improve, but it's a hard model to monetize. For example
Healthy Wage offers up to $10,000 for meeting some difficult weight loss goals, but requires
substantial proof.
There are also platforms where you can bet on a weight loss plan, and people will bet against you. If you succeed, you win the counterbets, if you lose, you've gotta pay up.
I've thought of that at first. But with proper planning, developers could come up with a way to prevent cheating of the system. Believe me, monetizing the number of exercises a person does could turn out to be beneficial for society as we know it. But even if this never becomes a reality via the use of an app, at least it could be done "the hard way" (by rewarding people manually who provide proof of walking). Back in the day where MangoCoinz was popular, I used to have a lot of fun walking while getting paid in return. With enough demand, any project which decides to reward its users via walking will become successful in the long run.