it is not possible to make bitcoin price only rise, at least not forever.
any commodity has a fixed amount of demand, for example if all the people in the world invest in bitcoin then there is no more demand so the price can't rise more. there is an end to the rise until we reach a balance.
To some degree, I think it maybe could be possible. We can't just say "it can't happen" then walk away from the challenge of finding the key to make it a reality. You've got to try at least.