That's right, what you've described is called Spot Trading, and it's the simplest way to trade. You can buy BTC with dollars when the price is low, and then when it rises, you sell it again and get your dollars back.

Can I trade instantly only by converting assets
for example from $ to Bitcoin $BTC
I mean I convert dollars when Bitcoin drops to Bitcoin and when its price rises I convert it back to dollars #
Is there a profit, thank you, I am new to Binance 😊