I'm not saying Monero's price isn't going to go higher. But no matter how high the price goes, Bitcoin is still going to outperform it. Also, Monero's price will only look good if Bitcoin's price is looking good. This is because the support behind Bitcoin is much stronger than that of Monero.
There is no doubt that any altcoin that is available in the market moves up or down when Bitcoin moves in that direction, whether it's Monero, Ethereum, or any other strong altcoins with a lot of supporters and investors, none of these coins or tokens can be compared with Bitcoin because Bitcoin has a very large user base and it has an extremely large investor's base, and no other cryptocurrency can have that many investors which means they can't compete with it.
The growth percentage can be different and that is because the price of Bitcoin is already pretty high, which means that for Bitcoin to do a 2x or 3x, it will need a lot of investments, but another coin or token worth $5 or something wouldn't need that much.
We need to know how we can differentiate between different cryptocurrencies when we are making our investments, and we should know our goals and targets before doing that.