this is why I haven't made it in crypto yet, it happened to me before and thank God I dodged this one

If $BTC falls 1%then my coins falls 10% then btc increases 1% then my coins remain same, then again btc falls 1% and my coins falls 10% more with total 20% of falls and so on.
It looks like a scam like someone is sitting behind the screen and forcing the coins to go down by force which is unreal . Or what is the reason behind it?
Kindly share your ideas and opinions too that what's happening with you.