[...]until we have no market for turning XMR in $ or , the cashout probably will still be in BTC, which does not lift the price of XMR a little bit.
[...]
Can you explain why it makes a difference for the dollar price of a monero, whether it is being 'cashed out' to dollars or bitcoins?
I do not endorse it but there is a clear incentive, especially in the DNM sector, that merchants keep their profits in XMR. That actually does lift the price of a monero.