Let's talk about the smallest unit of Bitcoin.
Bitcoin transaction fees are usually quoted in sat/vB, meaning how many satoshis you pay per virtual byte.
One thing worth thinking about: pricing small amounts in satoshis is more intuitive. Saying “1,000 sats” makes it easier to keep track than saying “0.00001 BTC.”
Before withdrawing, check whether the amount is denominated in BTC or sats. Move the decimal point by one place, and the amount changes by an order of magnitude.
$BTC You don't have to buy a whole coin—fractions of a coin, or even smaller amounts, are also available.

Just take this as something to listen to, not advice to buy. Make your own decision.