Very improbable theory but where is the evidence? we know that XRP is correlated to bitcoin and there are tests that you can make on the data to make this inference, but you cannot make the same inference backwards, in fact you are trying to argue they are negatively correlated in a similar fashion than what we see between stable coins and bitcoin when compared on their BTC price.

Personally this is a topic that I have studied for a long time and I simply do not see it and in the few cases that this may have happened this can be attributed to a simple coincidence and nothing more.