Last dawn, the phone kept ringing nonstop, and my friend from Shenzhen kept sending voice messages. His voice was obviously anxious: "Bro, I put 10,000 USDT full position with 50x leverage to go long, and it only dropped 3% but was wiped out completely. What’s going on?"

I pulled up his trading screenshot. He went all-in with 9,500 USDT at once, without even setting a stop-loss.

Actually, this is a very common misconception—many people think "full position can withstand market fluctuations," but in reality, quite the opposite. Using full position incorrectly can lead to faster ruin than anything else.

**The core issue isn’t leverage, but position size proportion**

Suppose you have 1,000 USDT in your account:

If you use 900 USDT to open a 10x leverage position, a mere 5% adverse move can cause liquidation; but if you use 100 USDT with 10x leverage, it takes a 50% adverse move to wipe out the account.

That guy just poured 95% of his principal into one shot, with 10x leverage, and a slight correction would knock him out.

**I’ve been using full position for over half a year without liquidation and even doubled my funds, relying on these 3 principles**

First: No single trade exceeds 20% of total funds

In a 10,000 USDT account, only invest up to 2,000 USDT at once. Even if you misjudge and lose 10% on the stop-loss, that’s only 200 USDT loss, leaving the principal intact and ready to rebound.

Second: Keep the loss on a single stop-loss within 3% of total position

For example, using 2,000 USDT with 10x leverage, set a 1.5% stop-loss in advance. A loss of 300 USDT is exactly 3% of total funds. Even multiple mistakes won’t hurt the core capital.

Third: Don’t open new positions during sideways markets, and don’t add funds when in profit

Only trade trend breakouts; sideways markets are just to watch. Once in a position, never add more. Emotions are the biggest killer in trading.

**Full position usage is about creating a fault-tolerance space, not gambling**

The original design of full position mode is to leave buffer for market fluctuations, but the premise must be light position size for trial-and-error combined with strict risk control systems.

A friend of mine used to blow up his account every month, but after following these 3 principles, he grew his account from 5,000 USDT to 8,000 in 3 months. He later told me: "I used to think full position was gambling my life, but now I understand, full position is about living steadily."

Long-term survival in crypto markets is never about who makes money fast, but about who can stay alive long enough.