That is very interesting. Do you know of any objects that are at rest? I don't.
Lets say that you take two masses and speed them up to close to the speed of light will you agree that their masses have increased? I will assume an affirmative. Now lets slam them together so that they are now at rest relative to you. Have the masses of the particles stayed the same, increased or returned to the same mass as before the acceleration?
Sorry, I’m not a physicist, nor do I play one on TV. However, I do know the difference between relativity and relativism, and it appears you’re selling both at the same time.
Au revoir.