Deal with currencies that change their prices daily ..because they drop and rise on the same day and sometimes in less than half an hour

With everyone or just with me only
When you buy a currency, it only takes moments for its price to drop
And when you sell the currency, you see its price rise
You feel as if there is someone watching your transactions and controlling the price just to frustrate you, and they are lurking and controlling the price
$BNB
$XRP
$BTC