Read this post and its true how small investor are losing bitcoin by investing in other coins.
You can buy 8000 tokens in 1 USD when price of bitcoin is 8000 USD but if bitcoin price will rise to 16000 USD then you can buy 16000 tokens in same price. Now all token price does not move according to BTC price,it will drop 20-30% without any sign of drop, but when you will compare with bitcoin you will find that you are in loss.
https://cryptomaa.com/btc/how-small-investors-are-losing-bitcoin-by-investing-in-altcoins/I have known this thing since I saw the extremely volatile of Altcoins last 2018 and think about not to fully invest in it unless I fully know the coin. When you put your money on altcoins from bitcoin, expect the worst thing to come because the loss rate is higher than 50%. This were a lot of people who failed when they think they will hit the jackpot just like that and the result there are lots of them who lose their money due to their blind investment method on Altcoins.