so why isn't it OK to mix bitcoin prices with altcoins? What I know is that bitcoin and altcoin price movements always go hand in hand. anyone would want to get the best price and hold it to get maximum profit. But sometimes there are many things that can hinder that plan, for example not having the capital or choosing the wrong time to buy.
The market movement won't go hand in hand all the time, and profitability varies. Just a simple calculation based on what OP had invested, he mentioned his investment as a small fraction of BTC and ETH. Let us take 0.1
BTC and 0.5ETH in the value of $30k and $2100, which will be $3000 in bitcoin and $1050 in Ethereum. What profit has he made out of the investment by now? From bitcoin, his profit adds up to another $2000, as the market value of bitcoin is around $50k whereas the profit from Ethereum's $1050 investment is just $275, which is the difference between holding bitcoin and altcoins.