Question 1

What does the bid-ask spread cost?

Accepted Answer

Every time you take liquidity you buy at the higher ask and sell at the lower bid. The spread × your size is the immediate, invisible cost — on top of fees and slippage.

Question 2

Why do illiquid coins cost more to trade?

Accepted Answer

Thin order books have wide spreads, so entering and exiting costs a bigger percentage. A tight-spread major might cost 0.01% while a microcap costs 1%+ just on the spread.

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