If we stop spending bitcoin for one month, and instead, we agree to each one of us to acquire 1 BTC more to add to our stash during this month, how much would the price increase?
We could call this "1BTC month"
Research game theory. It won't work. Everyone who is willing to hold probably is. If someone is considering selling right now, they will be more likely to do so if the price spikes. Even if everyone is honest and holds out as planned, non-participants will be able to sell, and probably will. There's also the problem of what happens when the month is over. Just let the market run it's course.
I was going to say the same thing. If you're a bad trader, just dollar cost average. Otherwise, you have to wait for the buying and selling opportunities.