Quick reference: Contract leverage
With isolated margin, opening a 10x long position means you could be liquidated before the price falls 10%, because maintenance margin is also deducted.
Leverage = position notional value ÷ margin used: using 1,000 USDT in margin to open a 10x position gives you a 10,000 USDT position.
Before placing an order, work out how much this position would lose if the price moved 5% against you, and whether your account could handle it.
By the way: $BTC is quoted at 81675.23, up 0.068% over 24h.

Crypto carries risks. Be cautious when entering the market.