And this is why they have an enhanced privacy feature. Each investors can go on their own. And it's up to them if they will invest only on one or two coins. If they invest in two coins, that second coin doesn't always need to be Bitcoin. Investing is also different from staking, but both of them are a great way to make a profit here in crypto.
Zcash is bitcoin+CoinJoin, It enhances your privacy, but it does not enhance it to the maximum extent, and you can obtain similar privacy if you use bitcoin+CoinJoin, so whoever wants to enhance your privacy, instead of investing in Zcash, which does not perform well, you can obtain similar privacy from investing in bitcoin and using any service that supports CoinJoin.
So whoever wants to invest, bitcoin + monero is much better.
Dash is the coinjoin one. Shielded Zcash transactions are encrypted using zkSNARKS. Privacy would be superior to Monero if all transactions were shielded but they’re only a small percentage. Monero is quick to adapt and make improvements but it is not completely untraceable in its current form. Blockchain analysis companies can still track payments to an extent but it involves a lot more guesswork than tracing BTC.