they say when Bitcoin increases in price that the particular shitcoin will also increase in price this is a lie and nothing put manipulation
Bitcoin is correlated to some crypto currency that is while it is not advisable to diversify our portfolio into any assets that is correlated to bitcoin. Let's assume you want to diversify your portfolio in bitcoin into some other assets, then you decided to choose Ethereum this wrong since Ethereum is correlated to bitcoin. Early today morning bitcoin was around $101k and Ethereum was around $20300. So if you watch the price of bitcoin and Ethereum you will observe that the two coin are correlated.Bitcoin is declining in price like wise Ethereum so there are crypto currency that are correlated to bitcoin.
This idea of diversification to shitcoins have ruined many people and I will advise you to discard it as quickly as you can. No matter how much those shitcoins try to copy Bitcoin, it can never be Bitcoin so that idea of corelation or whatever is not a strong evidence while I should spread my money to shitcoins that can fail my anytime.
Come.to think of it, Bitcoin is the real deal that have been tested and proven to overcome all forms of criticism. Now even critics are interested in Bitcoin so why will someone leave Bitcoin and invest in something else? The best advice you can give someone now is to take advantage of the corrections in the market to buy more Bitcoin instead of making the mistake of diversification.