Liquidity and adoption has nothing to do with privacy. Bitcoin is a transparent ledger for good reason. Monero has a private ledger for good reason.
I'd like to think we can agree that monero and bitcoin and like a shark and a lion. Different beasts and impossible to pit against each other. I see them as having two very distinct qualities. Monero is great for private spending, not so clever for long term saving. Bitcoin is great for transparent saving, not so clever at spending.
For the record, I have held equal units of both for many years and it's served me well in both regards.