If you have $1000 for safe leverage under x10 for future trading and use fund around $600 to $700, you should left $300 for make separated liquidation price based on your open or short position. Have consequence when lower leverage or safe with your future trading will earn small profitable depend when you use maximum leverage exactly with bitcoin when short or long position open in the future can raise to x125 but its near close with liquidation although your fund use for future half from $1000.
I think small leverage under $1000 is not really bad because you have bigger fund and easily earn profitable around $50 to $100 each position open exactly with coins have faster moving up or down price.