3. Always set stop loss below 10% of the account
It shouldn't be a must. It should depend on the market one is trading and how volatile it is. Imagine if someone opened a position on 10x leverage. 10% stop loss is just a 1% move on the spot market for the stop loss to be triggered. You will find more stop losses getting triggered more than you take profit in this volatile crypto markets4. Do not borrow, deposit too large (under 25X is safe)
Anything above 10x is very high. The number of trades I won on a leverage of more than 25x can't be more than 5 