Monero may be a good option for some individual users right now, but it isn't a long-term solution for bringing financial privacy to the masses. That pretty much has to be done through Bitcoin wallets with privacy features. Bitcoin is already criticized for not scaling well, but Monero is far worse. If I remember correctly, Monero transactions are roughly 4 times as large as Bitcoin transactions, and they don't have any way to do off-chain transactions the way Bitcoin can with Lightning.