On discovery channel they said in theory there is almost no limit ho fast can we move with magnetic levitation

Question

is it true, what do you think how many km/h can we go?

Answer 1

The practical limitations have to do with air resistance and stability. These are not fixed limits, but sooner or later a practical limit will obtain.

Note also that the top speed is limited by the fact that you can only accelerate to the point where you have to start decelerating for the next station.

Answer 2

I don't think the Discovery Channel meant that statement literally, or else whoever wrote the program forgot that nothing can move as fast as light. The speed of light is the speed limit of the universe -- nothing can go a fast as light travels.

Answer 3

I think if the technology proved feasible, you could approach the speed of light at 300,000 km/second (roughly a billion km/h).  You'd need an enormously powerful power plant to generate the energy on your spacecraft.

If we're talking about trains, then maybe mach 0.6 at sea level (700 km/h or so), and maybe mach 3 in a vacuum (due to other practical constraints).